31312132 has 6 divisors (see below), whose sum is σ = 54796238. Its totient is φ = 15656064.

The previous prime is 31312123. The next prime is 31312157. The reversal of 31312132 is 23121313.

It can be written as a sum of positive squares in only one way, i.e., 30980356 + 331776 = 5566^2 + 576^2 .

It is a super-2 number, since 2×31312132² = 1960899220770848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3914013 + ... + 3914020.

Almost surely, 2^31312132 is an apocalyptic number.

It is an amenable number.

31312132 is a deficient number, since it is larger than the sum of its proper divisors (23484106).

31312132 is a wasteful number, since it uses less digits than its factorization.

31312132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828037 (or 7828035 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 31312132 is about 5595.7244392482. The cubic root of 31312132 is about 315.1888747179.

Adding to 31312132 its reverse (23121313), we get a palindrome (54433445).

The spelling of 31312132 in words is "thirty-one million, three hundred twelve thousand, one hundred thirty-two".