231297031 has 8 divisors (see below), whose sum is σ = 270787104. Its totient is φ = 193418880.

The previous prime is 231297023. The next prime is 231297037. The reversal of 231297031 is 130792132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231297031 - 2³ = 231297023 is a prime.

It is a super-2 number, since 2×231297031² = 106996633098829922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231297037) 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, 402670 + ... + 403243.

It is an arithmetic number, because the mean of its divisors is an integer number (33848388).

Almost surely, 2^231297031 is an apocalyptic number.

231297031 is a deficient number, since it is larger than the sum of its proper divisors (39490073).

231297031 is an equidigital number, since it uses as much as digits as its factorization.

231297031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805961.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 231297031 is about 15208.4526168838. The cubic root of 231297031 is about 613.8421213053.

The spelling of 231297031 in words is "two hundred thirty-one million, two hundred ninety-seven thousand, thirty-one".