31275264 has 72 divisors (see below), whose sum is σ = 84065632. Its totient is φ = 10321920.

The previous prime is 31275221. The next prime is 31275269. The reversal of 31275264 is 46257213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31275269) 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 in 7 ways as a sum of consecutive naturals, for example, 148119 + ... + 148329.

Almost surely, 2^31275264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31275264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42032816).

31275264 is an abundant number, since it is smaller than the sum of its proper divisors (52790368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31275264 is a wasteful number, since it uses less digits than its factorization.

31275264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 409 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 31275264 is about 5592.4291680807. The cubic root of 31275264 is about 315.0651213309.

The spelling of 31275264 in words is "thirty-one million, two hundred seventy-five thousand, two hundred sixty-four".