31297204 has 24 divisors (see below), whose sum is σ = 60516288. Its totient is φ = 14087040.

The previous prime is 31297169. The next prime is 31297213. The reversal of 31297204 is 40279213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8442 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (2521512).

Almost surely, 2^31297204 is an apocalyptic number.

31297204 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31297204 is a deficient number, since it is larger than the sum of its proper divisors (29219084).

31297204 is a wasteful number, since it uses less digits than its factorization.

31297204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20055 (or 20053 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 31297204 is about 5594.3904046822. The cubic root of 31297204 is about 315.1387781883.

Subtracting 31297204 from its reverse (40279213), we obtain a square (8982009 = 2997²).

The spelling of 31297204 in words is "thirty-one million, two hundred ninety-seven thousand, two hundred four".