Compare 31 vs 55

Unique factors12
Total factors12
Prime factorization31151 × 111
Prime factorization315 × 11
Divisors count24
Divisors1, 311, 5, 11, 55
Number of properties181
Centered decagonal primes2nd 
Centered triangular primes2nd 
Chen primes11th 
Class 1+ primes8th 
Euclid primes4th 
Happy primes5th 
Lucky primes4th 
Mersenne primes3rd 
Multiplicative primes7th 
Pierpont primes of the 2nd kind8th 
Right-truncatable primes7th 
Semiprimes 19th
Sexy primes (1st member)7th 
Sexy prime triplets (1st member)5th 
Solinas primes10th 
Super primes5th 
Twin primes (2nd member)5th 
Roman numberalsXXXILV
Base 21111121101112
Base 31011320013
Base 413343134
Base 511152105
Base 65161316
Base 74371067
Base 8378678
Base 9349619
Base 1031105510
Base 1129115011
Base 1227124712
Base 1325134313
Base 1423143d14
Base 1521153a15
Base 161f163716
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