231504765 has 16 divisors (see below), whose sum is σ = 375937728. Its totient is φ = 121625856.

The previous prime is 231504761. The next prime is 231504781. The reversal of 231504765 is 567405132.

It is not a de Polignac number, because 231504765 - 2² = 231504761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231504761) 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 15 ways as a sum of consecutive naturals, for example, 114172 + ... + 116181.

It is an arithmetic number, because the mean of its divisors is an integer number (23496108).

Almost surely, 2^231504765 is an apocalyptic number.

It is an amenable number.

231504765 is a deficient number, since it is larger than the sum of its proper divisors (144432963).

231504765 is a wasteful number, since it uses less digits than its factorization.

231504765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230428.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 231504765 is about 15215.2806415130. The cubic root of 231504765 is about 614.0258356150.

Adding to 231504765 its reverse (567405132), we get a palindrome (798909897).

The spelling of 231504765 in words is "two hundred thirty-one million, five hundred four thousand, seven hundred sixty-five".