531345860 has 24 divisors (see below), whose sum is σ = 1116785880. Its totient is φ = 212355584.

The previous prime is 531345853. The next prime is 531345877. The reversal of 531345860 is 68543135.

It can be written as a sum of positive squares in 4 ways, for example, as 114532804 + 416813056 = 10702^2 + 20416^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 531345860.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13772 + ... + 35388.

It is an arithmetic number, because the mean of its divisors is an integer number (46532745).

Almost surely, 2^531345860 is an apocalyptic number.

It is an amenable number.

531345860 is an abundant number, since it is smaller than the sum of its proper divisors (585440020).

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

531345860 is a wasteful number, since it uses less digits than its factorization.

531345860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22855 (or 22853 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 531345860 is about 23050.9405448021. The cubic root of 531345860 is about 809.9516609877.

Adding to 531345860 its reverse (68543135), we get a palindrome (599888995).

The spelling of 531345860 in words is "five hundred thirty-one million, three hundred forty-five thousand, eight hundred sixty".