31328265 has 16 divisors (see below), whose sum is σ = 51854400. Its totient is φ = 16132032.

The previous prime is 31328261. The next prime is 31328279. The reversal of 31328265 is 56282313.

It is not a de Polignac number, because 31328265 - 2² = 31328261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31328261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35575 + ... + 36444.

It is an arithmetic number, because the mean of its divisors is an integer number (3240900).

Almost surely, 2^31328265 is an apocalyptic number.

It is an amenable number.

31328265 is a deficient number, since it is larger than the sum of its proper divisors (20526135).

31328265 is a wasteful number, since it uses less digits than its factorization.

31328265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72056.

The product of its digits is 8640, while the sum is 30.

The square root of 31328265 is about 5597.1658006530. The cubic root of 31328265 is about 315.2429971803.

The spelling of 31328265 in words is "thirty-one million, three hundred twenty-eight thousand, two hundred sixty-five".