81 (alƙalami)

81
positive integer (en) , odd number (en) , square number (en) , centered octagonal number (en) , heptagonal number (en) , composite number (en) , power of three (en) da harshad number (en)
Bayanai
Prime factor (en)	uku

81 (tamanin da ɗaya) alƙalami ne, tsakanin 80 da 82.

Wannan Muƙalar guntuwa ce: tana buƙatar a inganta ta, kuna iya gyara ta.