231442432 has 48 divisors (see below), whose sum is σ = 498427020. Its totient is φ = 106807296.

The previous prime is 231442411. The next prime is 231442451. The reversal of 231442432 is 234244132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 183223296 + 48219136 = 13536^2 + 6944^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 231442397 and 231442406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22278 + ... + 30970.

Almost surely, 2^231442432 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 231442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249213510).

231442432 is an abundant number, since it is smaller than the sum of its proper divisors (266984588).

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

231442432 is an equidigital number, since it uses as much as digits as its factorization.

231442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8728 (or 8708 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 231442432 is about 15213.2321352170. The cubic root of 231442432 is about 613.9707215470.

Adding to 231442432 its reverse (234244132), we get a palindrome (465686564).

The spelling of 231442432 in words is "two hundred thirty-one million, four hundred forty-two thousand, four hundred thirty-two".