531130521 has 8 divisors (see below), whose sum is σ = 715049920. Its totient is φ = 350649072.

The previous prime is 531130519. The next prime is 531130549. The reversal of 531130521 is 125031135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531130521 - 2¹ = 531130519 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (531130511) 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, 859126 + ... + 859743.

It is an arithmetic number, because the mean of its divisors is an integer number (89381240).

Almost surely, 2^531130521 is an apocalyptic number.

It is an amenable number.

531130521 is a deficient number, since it is larger than the sum of its proper divisors (183919399).

531130521 is a wasteful number, since it uses less digits than its factorization.

531130521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718975.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 531130521 is about 23046.2691340703. The cubic root of 531130521 is about 809.8422295979.

Adding to 531130521 its reverse (125031135), we get a palindrome (656161656).

The spelling of 531130521 in words is "five hundred thirty-one million, one hundred thirty thousand, five hundred twenty-one".