1. Numbers
  2. Compare 31 vs 45

Compare 31 vs 45

Property3145
Typeprimecomposite number
Unique factors12
Total factors13
Prime factorization31132 × 51
Prime factorization313 × 3 × 5
Divisors count26
Divisors1, 311, 3, 5, 9, 15, 45
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 numberalsXXXIXLV
Base 21111121011012
Base 31011312003
Base 413342314
Base 511151405
Base 65161136
Base 7437637
Base 8378558
Base 9349509
Base 1031104510
Base 1129114111
Base 1227123912
Base 1325133613
Base 1423143314
Base 1521153015
Base 161f162d16
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