231475836 has 12 divisors (see below), whose sum is σ = 540110312. Its totient is φ = 77158608.

The previous prime is 231475831. The next prime is 231475847. The reversal of 231475836 is 638574132.

231475836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 231475794 and 231475803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231475831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9644815 + ... + 9644838.

Almost surely, 2^231475836 is an apocalyptic number.

It is an amenable number.

231475836 is an abundant number, since it is smaller than the sum of its proper divisors (308634476).

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

231475836 is a wasteful number, since it uses less digits than its factorization.

231475836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19289660 (or 19289658 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 231475836 is about 15214.3299556701. The cubic root of 231475836 is about 614.0002581812. Note that the first 3 decimals are identical.

The spelling of 231475836 in words is "two hundred thirty-one million, four hundred seventy-five thousand, eight hundred thirty-six".