Compare 2 vs 15

Unique factors12
Total factors12
Prime factorization2131 × 51
Prime factorization23 × 5
Divisors count24
Divisors1, 21, 3, 5, 15
Number of properties261
Additive primes1st 
Bell primes1st 
Chen primes1st 
Class 1+ primes1st 
Dihedral primes1st 
Euclid primes1st 
Factorial primes1st 
Fibonacci primes1st 
Isolated primes1st 
Kynea primes1st 
Left-truncatable primes1st 
Lucas primes1st 
Mills primes1st 
Multiplicative primes1st 
Palindromic primes1st 
Pierpont primes1st 
Pierpont primes of the 2nd kind1st 
Quartan primes1st 
Restricted left-truncatable primes1st 
Right-truncatable primes1st 
Semiprimes 6th
Sophie germain primes1st 
Thabit primes1st 
Two-sided primes1st 
Ulam primes1st 
Wedderburn-etherington primes1st 
Roman numberalsIIXV
Base 210211112
Base 3231203
Base 424334
Base 525305
Base 626236
Base 727217
Base 828178
Base 929169
Base 102101510
Base 112111411
Base 122121312
Base 132131213
Base 142141114
Base 152151015
Base 16216f16
This website uses cookies to ensure you get the best experience on our website. More info