1. Numbers
  2. Compare 31 vs 42

Compare 31 vs 42

Property3142
Typeprimecomposite number
Unique factors13
Total factors13
Prime factorization31121 × 31 × 71
Prime factorization312 × 3 × 7
Divisors count28
Divisors1, 311, 2, 3, 6, 7, 14, 21, 42
Number of properties180
Centered decagonal primes2nd 
Centered triangular primes2nd 
Chen primes11th 
Class 1+ primes8th 
Emirps3rd 
Euclid primes4th 
Happy primes5th 
Lucky primes4th 
Mersenne primes3rd 
Multiplicative primes7th 
Pierpont primes of the 2nd kind8th 
Primes11th 
Right-truncatable primes7th 
Sexy primes (1st member)7th 
Sexy prime triplets (1st member)5th 
Solinas primes10th 
Super primes5th 
Twin primes (2nd member)5th 
Roman numberalsXXXIXLII
Base 21111121010102
Base 31011311203
Base 413342224
Base 511151325
Base 65161106
Base 7437607
Base 8378528
Base 9349469
Base 1031104210
Base 1129113911
Base 1227123612
Base 1325133313
Base 1423143014
Base 1521152c15
Base 161f162a16
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