15

Summary

15 is a Q16317911^[1]. 15 ranks in the top 8% of positive_integer entities by monthly Wikipedia readership (296 views/month).^[2]

Key Facts

• 15's instance of is recorded as Q16317911^[3].
• 15's instance of is recorded as triangular number^[4].
• 15's instance of is recorded as composite number^[5].
• 15's instance of is recorded as odd number^[6].
• 15's instance of is recorded as centered tetrahedral number^[7].
• 15's instance of is recorded as hexagonal number^[8].
• 15's instance of is recorded as pentatope number^[9].
• 15's instance of is recorded as Mersenne number^[10].
• 15's instance of is recorded as cake number^[11].
• 15's instance of is recorded as Bell number^[12].
• 15 followed Q38582^[13].
• 15 was followed by 16^[14].
• 15's Commons category is recorded as 15 (number)^[15].
• 15's Unicode character is recorded as ⒂^[16].
• 15's Unicode character is recorded as ⓯^[17].
• 15's Unicode character is recorded as ⑮^[18].
• 15's Unicode character is recorded as ⒖^[19].
• 15's Unicode character is recorded as 𝋯^[20].
• 15's topic's main category is recorded as Category:Fifteen^[21].
• 15's numeric value is recorded as {'amount': '+15'}^[22].
• 15's different from is recorded as Q21425442^[23].
• 15's code is recorded as ௰௫^[24].
• 15's code is recorded as ௧௫^[25].
• 15's code is recorded as XV^[26].
• 15's code is recorded as 𒌋𒐙^[27].

Body

Definition and Type

Recorded instance of include Q16317911^[3], triangular number^[4], composite number^[5], odd number^[6], centered tetrahedral number^[7], and hexagonal number^[8].

Influence

Things named for 15 include Mount Everest^[28], a mountain^[29], in Nepal^[30]; 15 and 290 theorems^[31], a theorem^[32]; and Porcine coronavirus HKU15^[33], a taxon^[34].

Why It Matters

15 ranks in the top 8% of positive_integer entities by monthly Wikipedia readership (296 views/month).^[2] 15 has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.^[35] 15 is known by 51 alternative names across languages and contexts.^[36]

Entities named for 15 include Mount Everest^[28], a mountain^[29], in Nepal^[30]; 15 and 290 theorems^[31], a theorem^[32]; and Porcine coronavirus HKU15^[33], a taxon^[34].