230505131988 has 72 divisors (see below), whose sum is σ = 613420516800. Its totient is φ = 72780633216.

The previous prime is 230505131977. The next prime is 230505132001. The reversal of 230505131988 is 889131505032.

230505131988 is a `hidden beast` number, since 2 + 3 + 0 + 50 + 513 + 1 + 9 + 88 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5741328 + ... + 5781336.

It is an arithmetic number, because the mean of its divisors is an integer number (8519729400).

Almost surely, 2^230505131988 is an apocalyptic number.

It is an amenable number.

230505131988 is an abundant number, since it is smaller than the sum of its proper divisors (382915384812).

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

230505131988 is a wasteful number, since it uses less digits than its factorization.

230505131988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48461 (or 48456 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 230505131988 in words is "two hundred thirty billion, five hundred five million, one hundred thirty-one thousand, nine hundred eighty-eight".