231439959 has 12 divisors (see below), whose sum is σ = 334486152. Its totient is φ = 154208400.

The previous prime is 231439913. The next prime is 231439973. The reversal of 231439959 is 959934132.

It is not a de Polignac number, because 231439959 - 2⁹ = 231439447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231439759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13264 + ... + 25274.

It is an arithmetic number, because the mean of its divisors is an integer number (27873846).

Almost surely, 2^231439959 is an apocalyptic number.

231439959 is a deficient number, since it is larger than the sum of its proper divisors (103046193).

231439959 is a wasteful number, since it uses less digits than its factorization.

231439959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14158 (or 14155 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 231439959 is about 15213.1508570710. The cubic root of 231439959 is about 613.9685347469.

The spelling of 231439959 in words is "two hundred thirty-one million, four hundred thirty-nine thousand, nine hundred fifty-nine".