Compare 21881 vs 21887

Property	21881	21887
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	21881¹	43¹ × 509¹
Prime factorization	21881	43 × 509
Divisors count	2	4
Divisors	1, 21881	1, 43, 509, 21887
Number of properties	4	1
Chen primes	1204th
Isolated primes	1712th
Primes	2455th
Pythagorean primes	1217th
Semiprimes		5526th
Roman numberals
Base 2	101010101111001₂	101010101111111₂
Base 3	1010000102₃	1010000122₃
Base 4	11111321₄	11111333₄
Base 5	1200011₅	1200022₅
Base 6	245145₆	245155₆
Base 7	120536₇	120545₇
Base 8	52571₈	52577₈
Base 9	33012₉	33018₉
Base 10	21881₁₀	21887₁₀
Base 11	15492₁₁	15498₁₁
Base 12	107b5₁₂	107bb₁₂
Base 13	9c62₁₃	9c68₁₃
Base 14	7d8d₁₄	7d95₁₄
Base 15	673b₁₅	6742₁₅
Base 16	5579₁₆	557f₁₆