31316372 has 6 divisors (see below), whose sum is σ = 54803658. Its totient is φ = 15658184.

The previous prime is 31316359. The next prime is 31316381. The reversal of 31316372 is 27361313.

It can be written as a sum of positive squares in only one way, i.e., 31315216 + 1156 = 5596^2 + 34^2 .

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, 3914543 + ... + 3914550.

It is an arithmetic number, because the mean of its divisors is an integer number (9133943).

Almost surely, 2^31316372 is an apocalyptic number.

It is an amenable number.

31316372 is a deficient number, since it is larger than the sum of its proper divisors (23487286).

31316372 is a wasteful number, since it uses less digits than its factorization.

31316372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7829097 (or 7829095 counting only the distinct ones).

The product of its digits is 2268, while the sum is 26.

The square root of 31316372 is about 5596.1032871097. The cubic root of 31316372 is about 315.2031007322.

Adding to 31316372 its reverse (27361313), we get a palindrome (58677685).

The spelling of 31316372 in words is "thirty-one million, three hundred sixteen thousand, three hundred seventy-two".