231040686 has 32 divisors (see below), whose sum is σ = 468430848. Its totient is φ = 75962880.

The previous prime is 231040669. The next prime is 231040697. The reversal of 231040686 is 686040132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146281 + ... + 147851.

It is an arithmetic number, because the mean of its divisors is an integer number (14638464).

Almost surely, 2^231040686 is an apocalyptic number.

231040686 is an abundant number, since it is smaller than the sum of its proper divisors (237390162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231040686 is a wasteful number, since it uses less digits than its factorization.

231040686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 231040686 is about 15200.0225657727. The cubic root of 231040686 is about 613.6152650623.

The spelling of 231040686 in words is "two hundred thirty-one million, forty thousand, six hundred eighty-six".