Numero felice

it

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Numero felice

Quality:

Happy number - numbers with a certain property involving recursive summation. Article “Numero felice” in Italian Wikipedia has 13.9 points for quality (as of July 1, 2025). The article contains 5 references and 6 sections.

This article has the best quality in English Wikipedia. Also, this article is the most popular in that (Italian) language version.

Since the creation of article “Numero felice”, its content was written by 40 registered users of Italian Wikipedia and edited by 707 registered Wikipedia users in all languages.

The article is cited 191 times in Italian Wikipedia and cited 2972 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Italian): #2917 in December 2011
  • Global: #3030 in December 2011

The highest popularity rank from 2008:

  • Local (Italian): #47905 in March 2008
  • Global: #30238 in April 2019

There are 28 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Happy number
36.781
2German (de)
Fröhliche Zahl
36.0422
3French (fr)
Nombre heureux
26.4927
4Catalan (ca)
Nombre feliç
26.0286
5Chinese (zh)
快樂數
23.7375
6Spanish (es)
Número feliz
19.2945
7Dutch (nl)
Gelukkig getal
18.8992
8Greek (el)
Ευτυχής αριθμός
18.7714
9Romanian (ro)
Număr fericit
17.7587
10Japanese (ja)
ハッピー数
16.5998
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "Numero felice" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Happy number
2 084 925
2Spanish (es)
Número feliz
198 553
3Italian (it)
Numero felice
182 945
4German (de)
Fröhliche Zahl
118 054
5French (fr)
Nombre heureux
83 624
6Vietnamese (vi)
Số may mắn
76 622
7Chinese (zh)
快樂數
74 201
8Russian (ru)
Счастливое число (happy number)
68 445
9Japanese (ja)
ハッピー数
67 406
10Czech (cs)
Šťastné číslo
62 034
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2025

The most popular language versions of the article "Numero felice" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Happy number
5 223
2Japanese (ja)
ハッピー数
486
3Russian (ru)
Счастливое число (happy number)
389
4Spanish (es)
Número feliz
370
5Italian (it)
Numero felice
351
6German (de)
Fröhliche Zahl
265
7French (fr)
Nombre heureux
261
8Czech (cs)
Šťastné číslo
232
9Chinese (zh)
快樂數
232
10Dutch (nl)
Gelukkig getal
149
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "Numero felice" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Happy number
218
2German (de)
Fröhliche Zahl
62
3French (fr)
Nombre heureux
55
4Italian (it)
Numero felice
40
5Hebrew (he)
מספר שמח
37
6Hungarian (hu)
Boldog szám
32
7Spanish (es)
Número feliz
31
8Dutch (nl)
Gelukkig getal
30
9Vietnamese (vi)
Số may mắn
28
10Chinese (zh)
快樂數
27
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2025

Language versions of the article "Numero felice" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Arabic (ar)
عدد سعيد
0
2Bulgarian (bg)
Щастливо число
0
3Catalan (ca)
Nombre feliç
0
4Czech (cs)
Šťastné číslo
0
5German (de)
Fröhliche Zahl
0
6Greek (el)
Ευτυχής αριθμός
0
7English (en)
Happy number
0
8Spanish (es)
Número feliz
0
9Basque (eu)
Zenbaki alai
0
10Persian (fa)
اعداد خوشحال
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "Numero felice" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Czech (cs)
Šťastné číslo
925
2English (en)
Happy number
337
3Swedish (sv)
Glada tal
332
4Italian (it)
Numero felice
191
5Hungarian (hu)
Boldog szám
158
6Ukrainian (uk)
Щасливе число
137
7Polish (pl)
Liczby wesołe
128
8Arabic (ar)
عدد سعيد
119
9Chinese (zh)
快樂數
101
10German (de)
Fröhliche Zahl
97
More...

Scores

Estimated value for Wikipedia:
Italian:
Global:
Popularity in June 2025:
Italian:
Global:
Popularity in all years:
Italian:
Global:
Authors in June 2025:
Italian:
Global:
Registered authors in all years:
Italian:
Global:
Citations:
Italian:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
عدد سعيد
bgBulgarian
Щастливо число
caCatalan
Nombre feliç
csCzech
Šťastné číslo
deGerman
Fröhliche Zahl
elGreek
Ευτυχής αριθμός
enEnglish
Happy number
esSpanish
Número feliz
euBasque
Zenbaki alai
faPersian
اعداد خوشحال
fiFinnish
Onnellinen luku
frFrench
Nombre heureux
heHebrew
מספר שמח
huHungarian
Boldog szám
hyArmenian
Ուրախ թիվ
itItalian
Numero felice
jaJapanese
ハッピー数
nlDutch
Gelukkig getal
noNorwegian
Lykkelig tall
plPolish
Liczby wesołe
ptPortuguese
Número feliz
roRomanian
Număr fericit
ruRussian
Счастливое число (happy number)
slSlovenian
Veselo število
svSwedish
Glada tal
ukUkrainian
Щасливе число
viVietnamese
Số may mắn
zhChinese
快樂數

Popularity rank trends

Best Rank Italian:
#47905
03.2008
Global:
#30238
04.2019

AI rank trends

Best Rank Italian:
#2917
12.2011
Global:
#3030
12.2011

Local AI rank history

Global AI rank history

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Happy number from Wikipedia articles about 13, Lucky number, List of prime numbers, 44 and 23. Whereas reading the article about Happy number people most often go to Wikipedia articles on Lucky number, Harshad number, Perfect digital invariant, Fortunate number and Number theory.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 28 January 2026

On 28 January 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2025–26 UEFA Champions League, Nipah virus, Doomsday Clock, UEFA Champions League, Elena Rybakina, Donald Trump, 2026 European Men's Handball Championship, killing of Alex Pretti, Kristi Noem, deaths in 2026.

In Italian Wikipedia the most popular articles on that day were: Niscemi, Morbo di K, Antonio Vergara, Moussa Diaby, Giovanni Borromeo, Antonio Chichiarelli, Il falsario (film 2025), Marty Supreme, I giorni del cielo, United States Immigration and Customs Enforcement.

About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information