Number 15

Representations of 15
Greek numeral
ιεʹ
Sanskrit numeral
१५
Arabic numeral
١٥
Roman numeral
XV
Maya numeral
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Chinese numeral
十五
Hebrew numeral
טו
15 in different numeral systems
Binary
1111
Base-3
120
Base-4
33
Base-5
30
Base-6
23
Base-7
21
Base-8
17
Duodecimal
13
Hex
f
Vigesimal
f
Base-24
f
Base-36
f
Negabinary
10011
Factorization
Prime factors
3, 5
Divisors
1, 3, 5, 15
Sum of divisors other than 15
9
Product of prime factors
15 = 3 x 5
Characteristics
Triangular Hexagonal Difference of 2 squares Mersenne Odd Ones-Zeroes Composite Deficient
Related primes
Number 15 prime
47
Prime number before 15
13
Prime number after 15
17