31664264 has 8 divisors (see below), whose sum is σ = 59370510. Its totient is φ = 15832128.

The previous prime is 31664239. The next prime is 31664309. The reversal of 31664264 is 46246613.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 1304164 = 5510^2 + 1142^2 .

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

It is a super-2 number, since 2×31664264² = 2005251229323392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31664264.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979009 + ... + 1979024.

Almost surely, 2^31664264 is an apocalyptic number.

It is an amenable number.

31664264 is a deficient number, since it is larger than the sum of its proper divisors (27706246).

31664264 is a wasteful number, since it uses less digits than its factorization.

31664264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958039 (or 3958035 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 31664264 is about 5627.1008521263. The cubic root of 31664264 is about 316.3659969116.

The spelling of 31664264 in words is "thirty-one million, six hundred sixty-four thousand, two hundred sixty-four".