253431816 has 32 divisors (see below), whose sum is σ = 691178400. Its totient is φ = 76797440.

The previous prime is 253431811. The next prime is 253431817. The reversal of 253431816 is 618134352.

It is a super-2 number, since 2×253431816² = 128455370722115712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (253431811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479721 + ... + 480248.

It is an arithmetic number, because the mean of its divisors is an integer number (21599325).

Almost surely, 2^253431816 is an apocalyptic number.

It is an amenable number.

253431816 is an abundant number, since it is smaller than the sum of its proper divisors (437746584).

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

253431816 is a wasteful number, since it uses less digits than its factorization.

253431816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959989 (or 959985 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 253431816 is about 15919.5419532096. The cubic root of 253431816 is about 632.8299796190.

The spelling of 253431816 in words is "two hundred fifty-three million, four hundred thirty-one thousand, eight hundred sixteen".