Subtracting from 31712 its reverse (21713), we obtain a palindrome (9999).
It is a congruent number.
It is an unprimeable number.
231712 is an apocalyptic number.
31712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.
It is an amenable number.
31712 is an equidigital number, since it uses as much as digits as its factorization.
31712 is an odious number, because the sum of its binary digits is odd.
The square root of 31712 is about 178.0786343164. The cubic root of 31712 is about 31.6524898068.
The spelling of 31712 in words is "thirty-one thousand, seven hundred twelve".