81 (alƙalami)

← 80 81 82 →
← 80 81 82 83 84 85 86 87 88 89 → ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	tamanin-ɗaya
Factorization (en)	34
Greek numeral	ΠΑ´
Roman numeral	LXXXI
Binary	10100012
Ternary	100003
Octal (en)	1218
Duodecimal system (en)	6912
Hexadecimal (en)	5116

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

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