231832140 has 48 divisors (see below), whose sum is σ = 650377728. Its totient is φ = 61703104.

The previous prime is 231832109. The next prime is 231832187. The reversal of 231832140 is 41238132.

231832140 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231832140² = 107492282273959200, which contains 22 as substring.

231832140 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 231832140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30349 + ... + 37211.

It is an arithmetic number, because the mean of its divisors is an integer number (13549536).

Almost surely, 2^231832140 is an apocalyptic number.

231832140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231832140 is an abundant number, since it is smaller than the sum of its proper divisors (418545588).

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

231832140 is a wasteful number, since it uses less digits than its factorization.

231832140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438 (or 7436 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 231832140 is about 15226.0349401937. The cubic root of 231832140 is about 614.3151342370.

The spelling of 231832140 in words is "two hundred thirty-one million, eight hundred thirty-two thousand, one hundred forty".