531130531 has 4 divisors (see below), whose sum is σ = 532026792. Its totient is φ = 530234272.

The previous prime is 531130519. The next prime is 531130549. The reversal of 531130531 is 135031135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135031135 = 5 ⋅27006227.

It is a cyclic number.

It is not a de Polignac number, because 531130531 - 2⁵ = 531130499 is a prime.

It is a super-2 number, since 2×531130531² = 564199281920683922, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 447241 + ... + 448426.

It is an arithmetic number, because the mean of its divisors is an integer number (133006698).

Almost surely, 2^531130531 is an apocalyptic number.

531130531 is a deficient number, since it is larger than the sum of its proper divisors (896261).

531130531 is an equidigital number, since it uses as much as digits as its factorization.

531130531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896260.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 531130531 is about 23046.2693510251. The cubic root of 531130531 is about 809.8422346804.

Adding to 531130531 its reverse (135031135), we get a palindrome (666161666).

The spelling of 531130531 in words is "five hundred thirty-one million, one hundred thirty thousand, five hundred thirty-one".