231020808 has 32 divisors (see below), whose sum is σ = 579182400. Its totient is φ = 76789568.

The previous prime is 231020767. The next prime is 231020819. The reversal of 231020808 is 808020132.

It is a super-2 number, since 2×231020808² = 106741227457945728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4791 + ... + 22022.

It is an arithmetic number, because the mean of its divisors is an integer number (18099450).

Almost surely, 2^231020808 is an apocalyptic number.

It is an amenable number.

231020808 is an abundant number, since it is smaller than the sum of its proper divisors (348161592).

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

231020808 is a wasteful number, since it uses less digits than its factorization.

231020808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27181 (or 27177 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 231020808 is about 15199.3686710995. The cubic root of 231020808 is about 613.5976667275.

The spelling of 231020808 in words is "two hundred thirty-one million, twenty thousand, eight hundred eight".