231357040 has 20 divisors (see below), whose sum is σ = 537905304. Its totient is φ = 92542784.

The previous prime is 231357017. The next prime is 231357059. The reversal of 231357040 is 40753132.

231357040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 231356996 and 231357014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445902 + ... + 1446061.

Almost surely, 2^231357040 is an apocalyptic number.

231357040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231357040 is an abundant number, since it is smaller than the sum of its proper divisors (306548264).

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

231357040 is a wasteful number, since it uses less digits than its factorization.

231357040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891976 (or 2891970 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 231357040 is about 15210.4253720927. The cubic root of 231357040 is about 613.8952029301.

The spelling of 231357040 in words is "two hundred thirty-one million, three hundred fifty-seven thousand, forty".