253665372 has 12 divisors (see below), whose sum is σ = 591885896. Its totient is φ = 84555120.

The previous prime is 253665337. The next prime is 253665383. The reversal of 253665372 is 273566352.

253665372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×253665372² = 128692241903796768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253665372.

It is a congruent number.

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, 10569379 + ... + 10569402.

Almost surely, 2^253665372 is an apocalyptic number.

It is an amenable number.

253665372 is an abundant number, since it is smaller than the sum of its proper divisors (338220524).

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

253665372 is a wasteful number, since it uses less digits than its factorization.

253665372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21138788 (or 21138786 counting only the distinct ones).

The product of its digits is 226800, while the sum is 39.

The square root of 253665372 is about 15926.8757764980. The cubic root of 253665372 is about 633.0243196734.

The spelling of 253665372 in words is "two hundred fifty-three million, six hundred sixty-five thousand, three hundred seventy-two".