231316538 has 4 divisors (see below), whose sum is σ = 346974810. Its totient is φ = 115658268.

The previous prime is 231316529. The next prime is 231316609. The reversal of 231316538 is 835613132.

231316538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 191462569 + 39853969 = 13837^2 + 6313^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57829133 + ... + 57829136.

Almost surely, 2^231316538 is an apocalyptic number.

231316538 is a deficient number, since it is larger than the sum of its proper divisors (115658272).

231316538 is a wasteful number, since it uses less digits than its factorization.

231316538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115658271.

The product of its digits is 12960, while the sum is 32.

The square root of 231316538 is about 15209.0939243599. The cubic root of 231316538 is about 613.8593774450.

The spelling of 231316538 in words is "two hundred thirty-one million, three hundred sixteen thousand, five hundred thirty-eight".