231691435344 has 40 divisors (see below), whose sum is σ = 665040232320. Its totient is φ = 77230478304.

The previous prime is 231691435321. The next prime is 231691435351. The reversal of 231691435344 is 443534196132.

231691435344 is a `hidden beast` number, since 2 + 3 + 169 + 143 + 5 + 344 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 231691435344.

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, 268160952 + ... + 268161815.

It is an arithmetic number, because the mean of its divisors is an integer number (16626005808).

Almost surely, 2^231691435344 is an apocalyptic number.

231691435344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231691435344 is an abundant number, since it is smaller than the sum of its proper divisors (433348796976).

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

231691435344 is a wasteful number, since it uses less digits than its factorization.

231691435344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536322784 (or 536322772 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 231691435344 in words is "two hundred thirty-one billion, six hundred ninety-one million, four hundred thirty-five thousand, three hundred forty-four".