231545928 has 32 divisors (see below), whose sum is σ = 579268800. Its totient is φ = 77128128.

The previous prime is 231545921. The next prime is 231545953. The reversal of 231545928 is 829545132.

It is a super-2 number, since 2×231545928² = 107227033546762368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231545921) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 47325 + ... + 51987.

It is an arithmetic number, because the mean of its divisors is an integer number (18102150).

Almost surely, 2^231545928 is an apocalyptic number.

It is an amenable number.

231545928 is an abundant number, since it is smaller than the sum of its proper divisors (347722872).

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

231545928 is a wasteful number, since it uses less digits than its factorization.

231545928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6741 (or 6737 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 231545928 is about 15216.6332675793. The cubic root of 231545928 is about 614.0622260072.

The spelling of 231545928 in words is "two hundred thirty-one million, five hundred forty-five thousand, nine hundred twenty-eight".