1. Numbers
  2. Compare 21991 vs 21997

Compare 21991 vs 21997

Property2199121997
Typeprimeprime
Unique factors11
Total factors11
Prime factorization219911219971
Prime factorization2199121997
Divisors count22
Divisors1, 219911, 21997
Number of properties58
Chen primes1208th1209th
Isolated primes1720th1721st
Left-truncatable primes 173rd
Primes2463rd2464th
Pythagorean primes 1223rd
Sexy primes (1st member)742nd743rd
Sexy primes (2nd member) 742nd
Sexy prime triplets (1st member)202nd 
Sexy prime triplets (2nd member) 202nd
Roman numberals  
Base 210101011110011121010101111011012
Base 31010011111310100112013
Base 4111132134111132314
Base 51200431512004425
Base 624545162455016
Base 712105471210637
Base 8527478527558
Base 9331449331519
Base 1021991102199710
Base 1115582111558811
Base 1210887121089112
Base 13a01813a02113
Base 14802b14803314
Base 1567b11567b715
Base 1655e71655ed16
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