253231881 has 32 divisors (see below), whose sum is σ = 410001408. Its totient is φ = 135717120.

The previous prime is 253231873. The next prime is 253231883. The reversal of 253231881 is 188132352.

It is not a de Polignac number, because 253231881 - 2³ = 253231873 is a prime.

It is a super-2 number, since 2×253231881² = 128252771109596322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253231883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117096 + ... + 119238.

It is an arithmetic number, because the mean of its divisors is an integer number (12812544).

Almost surely, 2^253231881 is an apocalyptic number.

253231881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

253231881 is a deficient number, since it is larger than the sum of its proper divisors (156769527).

253231881 is a wasteful number, since it uses less digits than its factorization.

253231881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its digits is 11520, while the sum is 33.

The square root of 253231881 is about 15913.2611679693. The cubic root of 253231881 is about 632.6635204495.

The spelling of 253231881 in words is "two hundred fifty-three million, two hundred thirty-one thousand, eight hundred eighty-one".