231263816 has 32 divisors (see below), whose sum is σ = 498104640. Its totient is φ = 98605248.

The previous prime is 231263783. The next prime is 231263819. The reversal of 231263816 is 618362132.

It is not an unprimeable number, because it can be changed into a prime (231263819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (15565770).

Almost surely, 2^231263816 is an apocalyptic number.

It is an amenable number.

231263816 is an abundant number, since it is smaller than the sum of its proper divisors (266840824).

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

231263816 is a wasteful number, since it uses less digits than its factorization.

231263816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21173 (or 21169 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 231263816 is about 15207.3605862424. The cubic root of 231263816 is about 613.8127366622.

The spelling of 231263816 in words is "two hundred thirty-one million, two hundred sixty-three thousand, eight hundred sixteen".