31712 has 12 divisors (see below), whose sum is σ = 62496. Its totient is φ = 15840.

The previous prime is 31699. The next prime is 31721. The reversal of 31712 is 21713.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464 + ... + 527.

It is an arithmetic number, because the mean of its divisors is an integer number (5208).

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 a deficient number, since it is larger than the sum of its proper divisors (30784).

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 sum of its prime factors is 1001 (or 993 counting only the distinct ones).

The product of its digits is 42, while the sum is 14.

The square root of 31712 is about 178.0786343164. The cubic root of 31712 is about 31.6524898068.

Subtracting from 31712 its reverse (21713), we obtain a palindrome (9999).

The spelling of 31712 in words is "thirty-one thousand, seven hundred twelve".