Compare 31 vs 49

Unique factors11
Total factors12
Prime factorization31172
Prime factorization317 × 7
Divisors count23
Divisors1, 311, 7, 49
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 17th
Sexy primes (1st member)7th 
Sexy prime triplets (1st member)5th 
Solinas primes10th 
Super primes5th 
Twin primes (2nd member)5th 
Roman numberalsXXXIXLIX
Base 21111121100012
Base 31011312113
Base 413343014
Base 511151445
Base 65161216
Base 74371007
Base 8378618
Base 9349549
Base 1031104910
Base 1129114511
Base 1227124112
Base 1325133a13
Base 1423143714
Base 1521153415
Base 161f163116
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