231549240 has 64 divisors (see below), whose sum is σ = 748087200. Its totient is φ = 56996352.

The previous prime is 231549239. The next prime is 231549251. The reversal of 231549240 is 42945132.

231549240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 231549198 and 231549207.

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, 72655 + ... + 75774.

Almost surely, 2^231549240 is an apocalyptic number.

231549240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231549240 is an abundant number, since it is smaller than the sum of its proper divisors (516537960).

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

231549240 is a wasteful number, since it uses less digits than its factorization.

231549240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148456 (or 148452 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 231549240 is about 15216.7420954684. The cubic root of 231549240 is about 614.0651538128.

The spelling of 231549240 in words is "two hundred thirty-one million, five hundred forty-nine thousand, two hundred forty".