231551351344032 has 96 divisors (see below), whose sum is σ = 609080530060800. Its totient is φ = 77024135377920.

The previous prime is 231551351343947. The next prime is 231551351344063. The reversal of 231551351344032 is 230443153155132.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115669969 + ... + 117654767.

It is an arithmetic number, because the mean of its divisors is an integer number (6344588854800).

Almost surely, 2^{231551351344032} is an apocalyptic number.

It is an amenable number.

231551351344032 is an abundant number, since it is smaller than the sum of its proper divisors (377529178716768).

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

231551351344032 is a wasteful number, since it uses less digits than its factorization.

231551351344032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987326 (or 1987318 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 231551351344032 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, three hundred fifty-one million, three hundred forty-four thousand, thirty-two".