231152540 has 12 divisors (see below), whose sum is σ = 485420376. Its totient is φ = 92461008.

The previous prime is 231152531. The next prime is 231152609. The reversal of 231152540 is 45251132.

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, 5778794 + ... + 5778833.

It is an arithmetic number, because the mean of its divisors is an integer number (40451698).

Almost surely, 2^231152540 is an apocalyptic number.

231152540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231152540 is an abundant number, since it is smaller than the sum of its proper divisors (254267836).

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

231152540 is a wasteful number, since it uses less digits than its factorization.

231152540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11557636 (or 11557634 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 231152540 is about 15203.7015229845. The cubic root of 231152540 is about 613.7142725140.

The spelling of 231152540 in words is "two hundred thirty-one million, one hundred fifty-two thousand, five hundred forty".