531560 has 32 divisors (see below), whose sum is σ = 1217160. Its totient is φ = 208896.

The previous prime is 531551. The next prime is 531569. The reversal of 531560 is 65135.

It is an interprime number because it is at equal distance from previous prime (531551) and next prime (531569).

It can be written as a sum of positive squares in 4 ways, for example, as 432964 + 98596 = 658^2 + 314^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531560.

It is not an unprimeable number, because it can be changed into a prime (531569) by changing a digit.

531560 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812 + ... + 3948.

2⁵³¹⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

531560 is an abundant number, since it is smaller than the sum of its proper divisors (685600).

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

531560 is a wasteful number, since it uses less digits than its factorization.

531560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 531560 is about 729.0816140872. The cubic root of 531560 is about 81.0060453751.

Adding to 531560 its reverse (65135), we get a palindrome (596695).

The spelling of 531560 in words is "five hundred thirty-one thousand, five hundred sixty".