231539472 has 100 divisors (see below), whose sum is σ = 705488080. Its totient is φ = 73109952.

The previous prime is 231539467. The next prime is 231539479. The reversal of 231539472 is 274935132.

It is a super-2 number, since 2×231539472² = 107221054188077568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (231539479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19923 + ... + 29325.

Almost surely, 2^231539472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231539472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352744040).

231539472 is an abundant number, since it is smaller than the sum of its proper divisors (473948608).

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

231539472 is a wasteful number, since it uses less digits than its factorization.

231539472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9442 (or 9427 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 231539472 is about 15216.4211298189. The cubic root of 231539472 is about 614.0565188276.

The spelling of 231539472 in words is "two hundred thirty-one million, five hundred thirty-nine thousand, four hundred seventy-two".