531511320325 has 6 divisors (see below), whose sum is σ = 659074037234. Its totient is φ = 425209056240.

The previous prime is 531511320317. The next prime is 531511320337. The reversal of 531511320325 is 523023115135.

It can be written as a sum of positive squares in 3 ways, for example, as 48476590276 + 483034730049 = 220174^2 + 695007^2 .

It is not a de Polignac number, because 531511320325 - 2³ = 531511320317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10630226382 + ... + 10630226431.

Almost surely, 2^531511320325 is an apocalyptic number.

It is an amenable number.

531511320325 is a deficient number, since it is larger than the sum of its proper divisors (127562716909).

531511320325 is a wasteful number, since it uses less digits than its factorization.

531511320325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260452823 (or 21260452818 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 531511320325 in words is "five hundred thirty-one billion, five hundred eleven million, three hundred twenty thousand, three hundred twenty-five".