31312672 has 12 divisors (see below), whose sum is σ = 61646886. Its totient is φ = 15656320.

The previous prime is 31312613. The next prime is 31312679. The reversal of 31312672 is 27621313.

It can be written as a sum of positive squares in only one way, i.e., 16289296 + 15023376 = 4036^2 + 3876^2 .

It is not an unprimeable number, because it can be changed into a prime (31312679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489229 + ... + 489292.

Almost surely, 2^31312672 is an apocalyptic number.

31312672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31312672 is a deficient number, since it is larger than the sum of its proper divisors (30334214).

31312672 is an equidigital number, since it uses as much as digits as its factorization.

31312672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978531 (or 978523 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 31312672 is about 5595.7726901653. The cubic root of 31312672 is about 315.1906865930.

Adding to 31312672 its reverse (27621313), we get a palindrome (58933985).

It can be divided in two parts, 313 and 12672, that multiplied together give a triangular number (3966336 = T₂₈₁₆).

The spelling of 31312672 in words is "thirty-one million, three hundred twelve thousand, six hundred seventy-two".