231555432 has 32 divisors (see below), whose sum is σ = 609357600. Its totient is φ = 73122624.

The previous prime is 231555431. The next prime is 231555439. The reversal of 231555432 is 234555132.

It is a self number, because there is not a number n which added to its sum of digits gives 231555432.

It is not an unprimeable number, because it can be changed into a prime (231555431) 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, 253443 + ... + 254354.

It is an arithmetic number, because the mean of its divisors is an integer number (19042425).

Almost surely, 2^231555432 is an apocalyptic number.

It is an amenable number.

231555432 is an abundant number, since it is smaller than the sum of its proper divisors (377802168).

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

231555432 is a wasteful number, since it uses less digits than its factorization.

231555432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507825 (or 507821 counting only the distinct ones).

The product of its digits is 18000, while the sum is 30.

The square root of 231555432 is about 15216.9455542169. The cubic root of 231555432 is about 614.0706274614.

The spelling of 231555432 in words is "two hundred thirty-one million, five hundred fifty-five thousand, four hundred thirty-two".