Compare 2 vs 13

Unique factors11
Total factors11
Prime factorization21131
Prime factorization213
Divisors count22
Divisors1, 21, 13
Number of properties2632
Additive primes1st 
Bell primes1st 
Centered square primes 2nd
Chen primes1st6th
Class 1+ primes1st 
Cousin primes (1st member) 3rd
Cuban primes 2 1st
Dihedral primes1st 
Emirps 1st
Euclid primes1st 
Factorial primes1st 
Fibonacci primes1st4th
Happy primes 2nd
Harmonic primes 2nd
Isolated primes1st 
Kynea primes1st 
Left-truncatable primes1st5th
Lucas primes1st 
Lucky primes 3rd
Mills primes1st 
Multiplicative primes1st5th
Palindromic primes1st 
Pierpont primes1st5th
Pierpont primes of the 2nd kind1st 
Prime quadruplets (2nd member) 2nd
Prime quadruplets (4th member) 1st
Prime quintuplet 1s (3rd member) 1st
Prime quintuplet 2s (2nd member) 2nd
Prime quintuplet 2s (4th member) 1st
Prime sextuplets (3rd member) 1st
Prime triplets (1st member) 4th
Prime triplets (2nd member) 3rd
Prime triplets (3rd member) 2nd
Proth primes 3rd
Pythagorean primes 2nd
Quartan primes1st 
Restricted left-truncatable primes1st 
Right-truncatable primes1st 
Sexy primes (1st member) 4th
Sexy primes (2nd member) 2nd
Sexy prime triplets (2nd member) 2nd
Solinas primes 5th
Sophie germain primes1st 
Thabit primes1st 
Thabit primes of the 2nd kind 2nd
Twin primes (2nd member) 3rd
Two-sided primes1st 
Ulam primes1st4th
Wedderburn-etherington primes1st 
Wilson primes 2nd
Roman numberalsIIXIII
Base 210211012
Base 3231113
Base 424314
Base 525235
Base 626216
Base 727167
Base 828158
Base 929149
Base 102101310
Base 112111211
Base 122121112
Base 132131013
Base 14214d14
Base 15215d15
Base 16216d16
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