1. Numbers
  2. Compare 31 vs 40

Compare 31 vs 40

Property3140
Typeprimecomposite number
Unique factors12
Total factors14
Prime factorization31123 × 51
Prime factorization312 × 2 × 2 × 5
Divisors count28
Divisors1, 311, 2, 4, 5, 8, 10, 20, 40
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 numberalsXXXIXL
Base 21111121010002
Base 31011311113
Base 413342204
Base 511151305
Base 65161046
Base 7437557
Base 8378508
Base 9349449
Base 1031104010
Base 1129113711
Base 1227123412
Base 1325133113
Base 1423142c14
Base 1521152a15
Base 161f162816
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