231356646 has 12 divisors (see below), whose sum is σ = 501272772. Its totient is φ = 77118876.

The previous prime is 231356633. The next prime is 231356669. The reversal of 231356646 is 646653132.

231356646 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 5 + 6 + 646 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 231356646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6426556 + ... + 6426591.

It is an arithmetic number, because the mean of its divisors is an integer number (41772731).

Almost surely, 2^231356646 is an apocalyptic number.

231356646 is an abundant number, since it is smaller than the sum of its proper divisors (269916126).

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

231356646 is a wasteful number, since it uses less digits than its factorization.

231356646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12853155 (or 12853152 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 231356646 is about 15210.4124204441. The cubic root of 231356646 is about 613.8948544430.

The spelling of 231356646 in words is "two hundred thirty-one million, three hundred fifty-six thousand, six hundred forty-six".