231996366 has 32 divisors (see below), whose sum is σ = 589198080. Its totient is φ = 66284568.

The previous prime is 231996353. The next prime is 231996367. The reversal of 231996366 is 663699132.

It is a happy number.

231996366 is a `hidden beast` number, since 2 + 3 + 1 + 9 + 9 + 636 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231996367) 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, 306496 + ... + 307251.

It is an arithmetic number, because the mean of its divisors is an integer number (18412440).

Almost surely, 2^231996366 is an apocalyptic number.

231996366 is an abundant number, since it is smaller than the sum of its proper divisors (357201714).

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

231996366 is a wasteful number, since it uses less digits than its factorization.

231996366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613765 (or 613759 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 231996366 is about 15231.4269193664. The cubic root of 231996366 is about 614.4601568447.

The spelling of 231996366 in words is "two hundred thirty-one million, nine hundred ninety-six thousand, three hundred sixty-six".