231381315 has 24 divisors (see below), whose sum is σ = 437521968. Its totient is φ = 112184640.

The previous prime is 231381287. The next prime is 231381347. The reversal of 231381315 is 513183132.

231381315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231381315 - 2⁶ = 231381251 is a prime.

It is a super-2 number, since 2×231381315² = 107074625862258450, which contains 22 as substring.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233224 + ... + 234213.

It is an arithmetic number, because the mean of its divisors is an integer number (18230082).

Almost surely, 2^231381315 is an apocalyptic number.

231381315 is a deficient number, since it is larger than the sum of its proper divisors (206140653).

231381315 is a wasteful number, since it uses less digits than its factorization.

231381315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467459 (or 467456 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 231381315 is about 15211.2233235858. The cubic root of 231381315 is about 613.9166730424.

The spelling of 231381315 in words is "two hundred thirty-one million, three hundred eighty-one thousand, three hundred fifteen".