Compare 199 vs 521

Unique factors11
Total factors11
Prime factorization19915211
Prime factorization199521
Divisors count22
Divisors1, 1991, 521
Number of properties106
Additive primes27th 
Centered triangular primes4th 
Chen primes36th70th
Lucas primes7th8th
Prime quadruplets (4th member)4th 
Prime triplets (3rd member)14th 
Pythagorean primes 46th
Sexy primes (2nd member)26th 
Solinas primes 39th
Twin primes (1st member) 25th
Twin primes (2nd member)15th 
Roman numberalsCXCIXDXXI
Base 211000111210000010012
Base 32110132010223
Base 430134200214
Base 51244540415
Base 6531622256
Base 7403713437
Base 8307810118
Base 924196389
Base 101991052110
Base 111711143411
Base 121471237512
Base 131241331113
Base 141031429314
Base 15d41524b15
Base 16c71620916
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