231231432 has 32 divisors (see below), whose sum is σ = 578710080. Its totient is φ = 76992960.

The previous prime is 231231409. The next prime is 231231439. The reversal of 231231432 is 234132132.

231231432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 231231399 and 231231408.

It is not an unprimeable number, because it can be changed into a prime (231231439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19557 + ... + 29067.

It is an arithmetic number, because the mean of its divisors is an integer number (18084690).

Almost surely, 2^231231432 is an apocalyptic number.

It is an amenable number.

231231432 is an abundant number, since it is smaller than the sum of its proper divisors (347478648).

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

231231432 is a wasteful number, since it uses less digits than its factorization.

231231432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10533 (or 10529 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 231231432 is about 15206.2958014107. The cubic root of 231231432 is about 613.7840844792.

Adding to 231231432 its reverse (234132132), we get a palindrome (465363564).

The spelling of 231231432 in words is "two hundred thirty-one million, two hundred thirty-one thousand, four hundred thirty-two".