531543432 has 96 divisors (see below), whose sum is σ = 1587862080. Its totient is φ = 145242240.

The previous prime is 531543359. The next prime is 531543433. The reversal of 531543432 is 234345135.

It is a self number, because there is not a number n which added to its sum of digits gives 531543432.

It is not an unprimeable number, because it can be changed into a prime (531543433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85882 + ... + 91862.

It is an arithmetic number, because the mean of its divisors is an integer number (16540230).

Almost surely, 2^531543432 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 531543432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793931040).

531543432 is an abundant number, since it is smaller than the sum of its proper divisors (1056318648).

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

531543432 is a wasteful number, since it uses less digits than its factorization.

531543432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6043 (or 6016 counting only the distinct ones).

The product of its digits is 21600, while the sum is 30.

The square root of 531543432 is about 23055.2256983097. The cubic root of 531543432 is about 810.0520375043.

Adding to 531543432 its reverse (234345135), we get a palindrome (765888567).

The spelling of 531543432 in words is "five hundred thirty-one million, five hundred forty-three thousand, four hundred thirty-two".