231038856 has 24 divisors (see below), whose sum is σ = 625730430. Its totient is φ = 77012928.

The previous prime is 231038851. The next prime is 231038861. The reversal of 231038856 is 658830132.

It is an interprime number because it is at equal distance from previous prime (231038851) and next prime (231038861).

It can be written as a sum of positive squares in only one way, i.e., 224100900 + 6937956 = 14970^2 + 2634^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 231038856.

It is not an unprimeable number, because it can be changed into a prime (231038851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1604365 + ... + 1604508.

Almost surely, 2^231038856 is an apocalyptic number.

It is an amenable number.

231038856 is an abundant number, since it is smaller than the sum of its proper divisors (394691574).

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

231038856 is a wasteful number, since it uses less digits than its factorization.

231038856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208885 (or 3208878 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 231038856 is about 15199.9623683745. The cubic root of 231038856 is about 613.6136449741.

Adding to 231038856 its reverse (658830132), we get a palindrome (889868988).

The spelling of 231038856 in words is "two hundred thirty-one million, thirty-eight thousand, eight hundred fifty-six".