231664279 has 16 divisors (see below), whose sum is σ = 289175040. Its totient is φ = 180300960.

The previous prime is 231664273. The next prime is 231664337. The reversal of 231664279 is 972466132.

It is a happy number.

It is not a de Polignac number, because 231664279 - 2⁹ = 231663767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231664273) 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, 99177 + ... + 101485.

It is an arithmetic number, because the mean of its divisors is an integer number (18073440).

Almost surely, 2^231664279 is an apocalyptic number.

231664279 is a deficient number, since it is larger than the sum of its proper divisors (57510761).

231664279 is a wasteful number, since it uses less digits than its factorization.

231664279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630.

The product of its digits is 108864, while the sum is 40.

The square root of 231664279 is about 15220.5216402067. The cubic root of 231664279 is about 614.1668308840.

The spelling of 231664279 in words is "two hundred thirty-one million, six hundred sixty-four thousand, two hundred seventy-nine".