Compare 640221 vs 640231

Property	640221	640231
Type	semiprime	prime
Unique factors	2	1
Total factors	2	1
Prime factorization	3¹ × 213407¹	640231¹
Prime factorization	3 × 213407	640231
Divisors count	4	2
Divisors	1, 3, 213407, 640221	1, 640231
Number of properties	1	2
Primes		52096th
Semiprimes	137190th
Twin primes (2nd member)		5634th
Roman numberals
Base 2	10011100010011011101₂	10011100010011100111₂
Base 3	1012112012220₃	1012112020021₃
Base 4	2130103131₄	2130103213₄
Base 5	130441341₅	130441411₅
Base 6	21415553₆	21420011₆
Base 7	5304351₇	5304364₇
Base 8	2342335₈	2342347₈
Base 9	1175186₉	1175207₉
Base 10	640221₁₀	640231₁₀
Base 11	3a800a₁₁	3a8019₁₁
Base 12	26a5b9₁₂	26a607₁₂
Base 13	19553a₁₃	195547₁₃
Base 14	129461₁₄	12946b₁₄
Base 15	c9a66₁₅	c9a71₁₅
Base 16	9c4dd₁₆	9c4e7₁₆