231316665 has 8 divisors (see below), whose sum is σ = 370106688. Its totient is φ = 123368880.

The previous prime is 231316627. The next prime is 231316667. The reversal of 231316665 is 566613132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231316665 - 2⁸ = 231316409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231316667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7710541 + ... + 7710570.

It is an arithmetic number, because the mean of its divisors is an integer number (46263336).

Almost surely, 2^231316665 is an apocalyptic number.

It is an amenable number.

231316665 is a deficient number, since it is larger than the sum of its proper divisors (138790023).

231316665 is a wasteful number, since it uses less digits than its factorization.

231316665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15421119.

The product of its digits is 19440, while the sum is 33.

The square root of 231316665 is about 15209.0980994929. The cubic root of 231316665 is about 613.8594897876.

Adding to 231316665 its reverse (566613132), we get a palindrome (797929797).

The spelling of 231316665 in words is "two hundred thirty-one million, three hundred sixteen thousand, six hundred sixty-five".