231157140 has 48 divisors (see below), whose sum is σ = 648103680. Its totient is φ = 61559680.

The previous prime is 231157123. The next prime is 231157151. The reversal of 231157140 is 41751132.

It is a self number, because there is not a number n which added to its sum of digits gives 231157140.

It is a congruent number.

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, 52546 + ... + 56774.

It is an arithmetic number, because the mean of its divisors is an integer number (13502160).

Almost surely, 2^231157140 is an apocalyptic number.

231157140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231157140 is an abundant number, since it is smaller than the sum of its proper divisors (416946540).

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

231157140 is a wasteful number, since it uses less digits than its factorization.

231157140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152 (or 5150 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 231157140 is about 15203.8528011817. The cubic root of 231157140 is about 613.7183435154.

The spelling of 231157140 in words is "two hundred thirty-one million, one hundred fifty-seven thousand, one hundred forty".