531564 has 24 divisors (see below), whose sum is σ = 1353408. Its totient is φ = 161040.

The previous prime is 531551. The next prime is 531569. The reversal of 531564 is 465135.

It is not an unprimeable number, because it can be changed into a prime (531569) 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, 1882 + ... + 2145.

It is an arithmetic number, because the mean of its divisors is an integer number (56392).

2⁵³¹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

531564 is an abundant number, since it is smaller than the sum of its proper divisors (821844).

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

531564 is a wasteful number, since it uses less digits than its factorization.

531564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4045 (or 4043 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 531564 is about 729.0843572592. The cubic root of 531564 is about 81.0062485654.

Adding to 531564 its reverse (465135), we get a palindrome (996699).

The spelling of 531564 in words is "five hundred thirty-one thousand, five hundred sixty-four".