531243564 has 24 divisors (see below), whose sum is σ = 1241381568. Its totient is φ = 176822160.

The previous prime is 531243563. The next prime is 531243593. The reversal of 531243564 is 465342135.

It is not an unprimeable number, because it can be changed into a prime (531243563) 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, 23742 + ... + 40325.

It is an arithmetic number, because the mean of its divisors is an integer number (51724232).

Almost surely, 2^531243564 is an apocalyptic number.

It is an amenable number.

531243564 is an abundant number, since it is smaller than the sum of its proper divisors (710138004).

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

531243564 is a wasteful number, since it uses less digits than its factorization.

531243564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64765 (or 64763 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 531243564 is about 23048.7215263667. The cubic root of 531243564 is about 809.8996796957.

Adding to 531243564 its reverse (465342135), we get a palindrome (996585699).

The spelling of 531243564 in words is "five hundred thirty-one million, two hundred forty-three thousand, five hundred sixty-four".