231513525420444 has 48 divisors (see below), whose sum is σ = 600286952160000. Its totient is φ = 77162599288368.

The previous prime is 231513525420361. The next prime is 231513525420487. The reversal of 231513525420444 is 444024525315132.

231513525420444 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 1 + 352 + 54 + 204 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 231513525420444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118132662 + ... + 120076445.

It is an arithmetic number, because the mean of its divisors is an integer number (12505978170000).

Almost surely, 2^{231513525420444} is an apocalyptic number.

It is an amenable number.

231513525420444 is an abundant number, since it is smaller than the sum of its proper divisors (368773426739556).

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

231513525420444 is a wasteful number, since it uses less digits than its factorization.

231513525420444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238218119 (or 238218111 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 45.

The spelling of 231513525420444 in words is "two hundred thirty-one trillion, five hundred thirteen billion, five hundred twenty-five million, four hundred twenty thousand, four hundred forty-four".