231324639 has 96 divisors (see below), whose sum is σ = 425940480. Its totient is φ = 110170368.

The previous prime is 231324607. The next prime is 231324641. The reversal of 231324639 is 936423132.

It is not a de Polignac number, because 231324639 - 2⁵ = 231324607 is a prime.

It is a super-2 number, since 2×231324639² = 107022177216960642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231324679) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 834969 + ... + 835245.

It is an arithmetic number, because the mean of its divisors is an integer number (4436880).

Almost surely, 2^231324639 is an apocalyptic number.

231324639 is a deficient number, since it is larger than the sum of its proper divisors (194615841).

231324639 is a wasteful number, since it uses less digits than its factorization.

231324639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 342 counting only the distinct ones).

The product of its digits is 23328, while the sum is 33.

The square root of 231324639 is about 15209.3602429557. The cubic root of 231324639 is about 613.8665434073.

The spelling of 231324639 in words is "two hundred thirty-one million, three hundred twenty-four thousand, six hundred thirty-nine".