Compare 13 vs 53

Unique factors11
Total factors11
Prime factorization131531
Prime factorization1353
Divisors count22
Divisors1, 131, 53
Number of properties3218
Centered square primes2nd 
Chen primes6th15th
Class 1+ primes 10th
Cousin primes (1st member)3rd 
Cuban primes 21st 
Fibonacci primes4th 
Good primes 7th
Happy primes2nd 
Harmonic primes2nd 
Isolated primes 5th
Left-truncatable primes5th11th
Lucky primes3rd 
Multiplicative primes5th 
Pierpont primes5th 
Pierpont primes of the 2nd kind 10th
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 primes3rd 
Pythagorean primes2nd7th
Restricted right-truncatable primes 1st
Right-truncatable primes 9th
Sexy primes (1st member)4th11th
Sexy primes (2nd member)2nd10th
Sexy prime quadrupletss (3rd member) 3rd
Sexy prime triplets (2nd member)2nd7th
Sexy prime triplets (3rd member) 6th
Solinas primes5th 
Sophie germain primes 8th
Thabit primes of the 2nd kind2nd 
Twin primes (2nd member)3rd 
Two-sided primes 7th
Ulam primes4th6th
Wilson primes2nd 
Roman numberalsXIIILIII
Base 2110121101012
Base 3111312223
Base 43143114
Base 52352035
Base 62161256
Base 71671047
Base 8158658
Base 9149589
Base 1013105310
Base 1112114911
Base 1211124512
Base 1310134113
Base 14d143b14
Base 15d153815
Base 16d163516
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