231242528 has 24 divisors (see below), whose sum is σ = 496646640. Its totient is φ = 105110080.

The previous prime is 231242513. The next prime is 231242537. The reversal of 231242528 is 825242132.

It is a self number, because there is not a number n which added to its sum of digits gives 231242528.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328118 + ... + 328821.

It is an arithmetic number, because the mean of its divisors is an integer number (20693610).

Almost surely, 2^231242528 is an apocalyptic number.

It is an amenable number.

231242528 is an abundant number, since it is smaller than the sum of its proper divisors (265404112).

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

231242528 is a wasteful number, since it uses less digits than its factorization.

231242528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656960 (or 656952 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 231242528 is about 15206.6606459143. The cubic root of 231242528 is about 613.7939021169.

It can be divided in two parts, 23124 and 2528, that added together give a palindrome (25652).

The spelling of 231242528 in words is "two hundred thirty-one million, two hundred forty-two thousand, five hundred twenty-eight".