531522 has 40 divisors (see below), whose sum is σ = 1267596. Its totient is φ = 165888.

The previous prime is 531521. The next prime is 531547. The reversal of 531522 is 225135.

It is a happy number.

531522 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 81 = 729^2 + 9^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 531495 and 531504.

It is not an unprimeable number, because it can be changed into a prime (531521) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2658 + ... + 2850.

2⁵³¹⁵²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633798).

531522 is an abundant number, since it is smaller than the sum of its proper divisors (736074).

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

531522 is a wasteful number, since it uses less digits than its factorization.

531522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 215 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 531522 is about 729.0555534388. The cubic root of 531522 is about 81.0041150173.

Adding to 531522 its reverse (225135), we get a palindrome (756657).

The spelling of 531522 in words is "five hundred thirty-one thousand, five hundred twenty-two".