231135221823318 has 40 divisors (see below), whose sum is σ = 518071100599800. Its totient is φ = 77021719693920.

The previous prime is 231135221823281. The next prime is 231135221823419. The reversal of 231135221823318 is 813328122531132.

231135221823318 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 3 + 522 + 1 + 82 + 33 + 18 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 215706943 + ... + 216775818.

It is an arithmetic number, because the mean of its divisors is an integer number (12951777514995).

Almost surely, 2^{231135221823318} is an apocalyptic number.

231135221823318 is an abundant number, since it is smaller than the sum of its proper divisors (286935878776482).

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

231135221823318 is a wasteful number, since it uses less digits than its factorization.

231135221823318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432486074 (or 432486065 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 231135221823318 in words is "two hundred thirty-one trillion, one hundred thirty-five billion, two hundred twenty-one million, eight hundred twenty-three thousand, three hundred eighteen".