15 (number)

15 (fifteen) is the natural number following 14 and preceding 16.

← 14 15 16 →
Cardinalfifteen
Ordinal15th
(fifteenth)
Numeral systempentadecimal
Factorization3 × 5
Divisors1, 3, 5, 15
Greek numeralΙΕ´
Roman numeralXV, xv
Binary11112
Ternary1203
Senary236
Octal178
Duodecimal1312
HexadecimalF16
Hebrew numeralט"ו / י"ה
Babylonian numeral𒌋𒐙
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