231163257140 has 24 divisors (see below), whose sum is σ = 485602600392. Its totient is φ = 92434872320.

The previous prime is 231163257137. The next prime is 231163257167. The reversal of 231163257140 is 41752361132.

231163257140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 123098529316 + 108064727824 = 350854^2 + 328732^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231163257140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1839569 + ... + 1961208.

It is an arithmetic number, because the mean of its divisors is an integer number (20233441683).

Almost surely, 2^231163257140 is an apocalyptic number.

231163257140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231163257140 is an abundant number, since it is smaller than the sum of its proper divisors (254439343252).

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

231163257140 is a wasteful number, since it uses less digits than its factorization.

231163257140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803827 (or 3803825 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 231163257140 in words is "two hundred thirty-one billion, one hundred sixty-three million, two hundred fifty-seven thousand, one hundred forty".