231564459 has 16 divisors (see below), whose sum is σ = 355986432. Its totient is φ = 131150208.

The previous prime is 231564427. The next prime is 231564461. The reversal of 231564459 is 954465132.

It is not a de Polignac number, because 231564459 - 2⁵ = 231564427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231564469) 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, 46419 + ... + 51164.

It is an arithmetic number, because the mean of its divisors is an integer number (22249152).

Almost surely, 2^231564459 is an apocalyptic number.

231564459 is a deficient number, since it is larger than the sum of its proper divisors (124421973).

231564459 is a wasteful number, since it uses less digits than its factorization.

231564459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97706.

The product of its digits is 129600, while the sum is 39.

The square root of 231564459 is about 15217.2421614431. The cubic root of 231564459 is about 614.0786070389.

The spelling of 231564459 in words is "two hundred thirty-one million, five hundred sixty-four thousand, four hundred fifty-nine".