1. Numbers
  2. Compare 21985 vs 21997

Compare 21985 vs 21997

Property2198521997
Typesemiprimeprime
Unique factors21
Total factors21
Prime factorization51 × 43971219971
Prime factorization5 × 439721997
Divisors count42
Divisors1, 5, 4397, 219851, 21997
Number of properties18
Chen primes 1209th
Isolated primes 1721st
Left-truncatable primes 173rd
Primes 2464th
Pythagorean primes 1223rd
Semiprimes5550th 
Sexy primes (1st member) 743rd
Sexy primes (2nd member) 742nd
Sexy prime triplets (2nd member) 202nd
Roman numberals  
Base 210101011110000121010101111011012
Base 31010011021310100112013
Base 4111132014111132314
Base 51200420512004425
Base 624544162455016
Base 712104571210637
Base 8527418527558
Base 9331379331519
Base 1021985102199710
Base 1115577111558811
Base 1210881121089112
Base 13a01213a02113
Base 14802514803314
Base 1567aa1567b715
Base 1655e11655ed16
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