253309864 has 16 divisors (see below), whose sum is σ = 475139700. Its totient is φ = 126605952.

The previous prime is 253309841. The next prime is 253309883. The reversal of 253309864 is 468903352.

253309864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 250968964 + 2340900 = 15842^2 + 1530^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25404 + ... + 33940.

Almost surely, 2^253309864 is an apocalyptic number.

It is an amenable number.

253309864 is a deficient number, since it is larger than the sum of its proper divisors (221829836).

253309864 is a wasteful number, since it uses less digits than its factorization.

253309864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12252 (or 12248 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 253309864 is about 15915.7112313588. The cubic root of 253309864 is about 632.7284568963.

The spelling of 253309864 in words is "two hundred fifty-three million, three hundred nine thousand, eight hundred sixty-four".