31625648 has 10 divisors (see below), whose sum is σ = 61274724. Its totient is φ = 15812816.

The previous prime is 31625647. The next prime is 31625651. The reversal of 31625648 is 84652613.

It is a super-2 number, since 2×31625648² = 2000363222839808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31625647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988286 + ... + 988317.

Almost surely, 2^31625648 is an apocalyptic number.

It is an amenable number.

31625648 is a deficient number, since it is larger than the sum of its proper divisors (29649076).

31625648 is a wasteful number, since it uses less digits than its factorization.

31625648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976611 (or 1976605 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 31625648 is about 5623.6685535334. The cubic root of 31625648 is about 316.2373370549.

The spelling of 31625648 in words is "thirty-one million, six hundred twenty-five thousand, six hundred forty-eight".