Compare 31 vs 199

Unique factors11
Total factors11
Prime factorization3111991
Prime factorization31199
Divisors count22
Divisors1, 311, 199
Number of properties1810
Additive primes 27th
Centered decagonal primes2nd 
Centered triangular primes2nd4th
Chen primes11th36th
Class 1+ primes8th 
Euclid primes4th 
Happy primes5th 
Lucas primes 7th
Lucky primes4th 
Mersenne primes3rd 
Multiplicative primes7th 
Pierpont primes of the 2nd kind8th 
Prime quadruplets (4th member) 4th
Prime triplets (3rd member) 14th
Right-truncatable primes7th 
Sexy primes (1st member)7th 
Sexy primes (2nd member) 26th
Sexy prime triplets (1st member)5th 
Solinas primes10th 
Super primes5th 
Twin primes (2nd member)5th15th
Roman numberalsXXXICXCIX
Base 2111112110001112
Base 310113211013
Base 4133430134
Base 5111512445
Base 65165316
Base 74374037
Base 83783078
Base 93492419
Base 10311019910
Base 11291117111
Base 12271214712
Base 13251312413
Base 14231410314
Base 152115d415
Base 161f16c716
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