31631368 has 8 divisors (see below), whose sum is σ = 59308830. Its totient is φ = 15815680.

The previous prime is 31631357. The next prime is 31631387. The reversal of 31631368 is 86313613.

It can be written as a sum of positive squares in only one way, i.e., 31337604 + 293764 = 5598^2 + 542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 1976953 + ... + 1976968.

Almost surely, 2^31631368 is an apocalyptic number.

It is an amenable number.

31631368 is a deficient number, since it is larger than the sum of its proper divisors (27677462).

31631368 is a wasteful number, since it uses less digits than its factorization.

31631368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953927 (or 3953923 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 31631368 is about 5624.1770953625. The cubic root of 31631368 is about 316.2564014181.

It can be divided in two parts, 316 and 31368, that added together give a square (31684 = 178²).

The spelling of 31631368 in words is "thirty-one million, six hundred thirty-one thousand, three hundred sixty-eight".