531347720 has 16 divisors (see below), whose sum is σ = 1195532460. Its totient is φ = 212539072.

The previous prime is 531347669. The next prime is 531347813. The reversal of 531347720 is 27743135.

It can be written as a sum of positive squares in 2 ways, for example, as 523585924 + 7761796 = 22882^2 + 2786^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6641807 + ... + 6641886.

Almost surely, 2^531347720 is an apocalyptic number.

It is an amenable number.

531347720 is an abundant number, since it is smaller than the sum of its proper divisors (664184740).

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

531347720 is a wasteful number, since it uses less digits than its factorization.

531347720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13283704 (or 13283700 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 531347720 is about 23050.9808901921. The cubic root of 531347720 is about 809.9526060773.

The spelling of 531347720 in words is "five hundred thirty-one million, three hundred forty-seven thousand, seven hundred twenty".