1. Numbers
  2. Compare 21991 vs 21992

Compare 21991 vs 21992

Property2199121992
Typeprimecomposite number
Unique factors12
Total factors14
Prime factorization21991123 × 27491
Prime factorization219912 × 2 × 2 × 2749
Divisors count28
Divisors1, 219911, 2, 4, 8, 2749, 5498, 10996, 21992
Number of properties50
Chen primes1208th 
Isolated primes1720th 
Primes2463rd 
Sexy primes (1st member)742nd 
Sexy prime triplets (1st member)202nd 
Roman numberals  
Base 210101011110011121010101111010002
Base 31010011111310100111123
Base 4111132134111132204
Base 51200431512004325
Base 624545162454526
Base 712105471210557
Base 8527478527508
Base 9331449331459
Base 1021991102199210
Base 1115582111558311
Base 1210887121088812
Base 13a01813a01913
Base 14802b14802c14
Base 1567b11567b215
Base 1655e71655e816
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