31013672 has 8 divisors (see below), whose sum is σ = 58150650. Its totient is φ = 15506832.

The previous prime is 31013669. The next prime is 31013677. The reversal of 31013672 is 27631013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19412836 + 11600836 = 4406^2 + 3406^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31013677) 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, 1938347 + ... + 1938362.

Almost surely, 2^31013672 is an apocalyptic number.

It is an amenable number.

31013672 is a deficient number, since it is larger than the sum of its proper divisors (27136978).

31013672 is a wasteful number, since it uses less digits than its factorization.

31013672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876715 (or 3876711 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 31013672 is about 5568.9920093317. The cubic root of 31013672 is about 314.1842401250.

Adding to 31013672 its reverse (27631013), we get a palindrome (58644685).

The spelling of 31013672 in words is "thirty-one million, thirteen thousand, six hundred seventy-two".