231551431340404 has 24 divisors (see below), whose sum is σ = 472956115080960. Its totient is φ = 97124916488736.

The previous prime is 231551431340389. The next prime is 231551431340429. The reversal of 231551431340404 is 404043134155132.

231551431340404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87975466519 + ... + 87975469150.

It is an arithmetic number, because the mean of its divisors is an integer number (19706504795040).

Almost surely, 2^{231551431340404} is an apocalyptic number.

It is an amenable number.

231551431340404 is an abundant number, since it is smaller than the sum of its proper divisors (241404683740556).

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

231551431340404 is a wasteful number, since it uses less digits than its factorization.

231551431340404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175950935727 (or 175950935725 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 231551431340404 its reverse (404043134155132), we get a palindrome (635594565495536).

The spelling of 231551431340404 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred forty thousand, four hundred four".