231032439 has 24 divisors (see below), whose sum is σ = 376219760. Its totient is φ = 140017680.

The previous prime is 231032413. The next prime is 231032467. The reversal of 231032439 is 934230132.

It is a happy number.

It is not a de Polignac number, because 231032439 - 2⁷ = 231032311 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231032479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32092 + ... + 38625.

Almost surely, 2^231032439 is an apocalyptic number.

231032439 is a deficient number, since it is larger than the sum of its proper divisors (145187321).

231032439 is a wasteful number, since it uses less digits than its factorization.

231032439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70748 (or 70731 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 231032439 is about 15199.7512808598. The cubic root of 231032439 is about 613.6079639741.

The spelling of 231032439 in words is "two hundred thirty-one million, thirty-two thousand, four hundred thirty-nine".