231552031 has 16 divisors (see below), whose sum is σ = 251602560. Its totient is φ = 212349600.

The previous prime is 231552001. The next prime is 231552047. The reversal of 231552031 is 130255132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231552031 is a prime.

It is a super-2 number, since 2×231552031² = 107232686120449922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231551993 and 231552011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231552001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158856 + ... + 160306.

It is an arithmetic number, because the mean of its divisors is an integer number (15725160).

Almost surely, 2^231552031 is an apocalyptic number.

231552031 is a deficient number, since it is larger than the sum of its proper divisors (20050529).

231552031 is a wasteful number, since it uses less digits than its factorization.

231552031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 231552031 is about 15216.8338033902. The cubic root of 231552031 is about 614.0676210331.

The spelling of 231552031 in words is "two hundred thirty-one million, five hundred fifty-two thousand, thirty-one".