231308351856 has 60 divisors (see below), whose sum is σ = 669664277880. Its totient is φ = 74444065920.

The previous prime is 231308351851. The next prime is 231308351861. The reversal of 231308351856 is 658153803132.

231308351856 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 0 + 83 + 518 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (231308351851) and next prime (231308351861).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231308351851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27690790 + ... + 27699141.

It is an arithmetic number, because the mean of its divisors is an integer number (11161071298).

Almost surely, 2^231308351856 is an apocalyptic number.

It is an amenable number.

231308351856 is an abundant number, since it is smaller than the sum of its proper divisors (438355926024).

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

231308351856 is a wasteful number, since it uses less digits than its factorization.

231308351856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55389974 (or 55389965 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 231308351856 in words is "two hundred thirty-one billion, three hundred eight million, three hundred fifty-one thousand, eight hundred fifty-six".