231312195528 has 64 divisors (see below), whose sum is σ = 579705984000. Its totient is φ = 76914158592.

The previous prime is 231312195509. The next prime is 231312195553. The reversal of 231312195528 is 825591213132.

It is a self number, because there is not a number n which added to its sum of digits gives 231312195528.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35166576 + ... + 35173152.

It is an arithmetic number, because the mean of its divisors is an integer number (9057906000).

Almost surely, 2^231312195528 is an apocalyptic number.

It is an amenable number.

231312195528 is an abundant number, since it is smaller than the sum of its proper divisors (348393788472).

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

231312195528 is a wasteful number, since it uses less digits than its factorization.

231312195528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9974 (or 9970 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The spelling of 231312195528 in words is "two hundred thirty-one billion, three hundred twelve million, one hundred ninety-five thousand, five hundred twenty-eight".