231334540 has 12 divisors (see below), whose sum is σ = 485802576. Its totient is φ = 92533808.

The previous prime is 231334513. The next prime is 231334547. The reversal of 231334540 is 45433132.

231334540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231334547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5783344 + ... + 5783383.

It is an arithmetic number, because the mean of its divisors is an integer number (40483548).

Almost surely, 2^231334540 is an apocalyptic number.

231334540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231334540 is an abundant number, since it is smaller than the sum of its proper divisors (254468036).

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

231334540 is a wasteful number, since it uses less digits than its factorization.

231334540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566736 (or 11566734 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 231334540 is about 15209.6857298236. The cubic root of 231334540 is about 613.8753013819.

Adding to 231334540 its reverse (45433132), we get a palindrome (276767672).

The spelling of 231334540 in words is "two hundred thirty-one million, three hundred thirty-four thousand, five hundred forty".