231032331 has 20 divisors (see below), whose sum is σ = 347138352. Its totient is φ = 153121968.

The previous prime is 231032327. The next prime is 231032339. The reversal of 231032331 is 133230132.

231032331 is a `hidden beast` number, since 2 + 310 + 323 + 31 = 666.

It is not a de Polignac number, because 231032331 - 2² = 231032327 is a prime.

It is a super-2 number, since 2×231032331² = 106751875934587122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231032339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5770 + ... + 22256.

Almost surely, 2^231032331 is an apocalyptic number.

231032331 is a deficient number, since it is larger than the sum of its proper divisors (116106021).

231032331 is a wasteful number, since it uses less digits than its factorization.

231032331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16672 (or 16663 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231032331 is about 15199.7477281697. The cubic root of 231032331 is about 613.6078683603.

Adding to 231032331 its reverse (133230132), we get a palindrome (364262463).

The spelling of 231032331 in words is "two hundred thirty-one million, thirty-two thousand, three hundred thirty-one".