231432288 has 96 divisors (see below), whose sum is σ = 649645920. Its totient is φ = 71884800.

The previous prime is 231432269. The next prime is 231432337. The reversal of 231432288 is 882234132.

231432288 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

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, 177238 + ... + 178538.

It is an arithmetic number, because the mean of its divisors is an integer number (6767145).

Almost surely, 2^231432288 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 231432288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324822960).

231432288 is an abundant number, since it is smaller than the sum of its proper divisors (418213632).

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

231432288 is a wasteful number, since it uses less digits than its factorization.

231432288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1432 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 231432288 is about 15212.8987375845. The cubic root of 231432288 is about 613.9617514114.

The spelling of 231432288 in words is "two hundred thirty-one million, four hundred thirty-two thousand, two hundred eighty-eight".