231456140 has 24 divisors (see below), whose sum is σ = 486346560. Its totient is φ = 92527488.

The previous prime is 231456133. The next prime is 231456149. The reversal of 231456140 is 41654132.

It is not an unprimeable number, because it can be changed into a prime (231456149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57101 + ... + 61019.

It is an arithmetic number, because the mean of its divisors is an integer number (20264440).

Almost surely, 2^231456140 is an apocalyptic number.

231456140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231456140 is an abundant number, since it is smaller than the sum of its proper divisors (254890420).

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

231456140 is a wasteful number, since it uses less digits than its factorization.

231456140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6881 (or 6879 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 231456140 is about 15213.6826573976. The cubic root of 231456140 is about 613.9828428399.

The spelling of 231456140 in words is "two hundred thirty-one million, four hundred fifty-six thousand, one hundred forty".