531240810525 has 72 divisors (see below), whose sum is σ = 987380241120. Its totient is φ = 283148187840.

The previous prime is 531240810517. The next prime is 531240810557. The reversal of 531240810525 is 525018042135.

531240810525 is a `hidden beast` number, since 5 + 3 + 12 + 40 + 81 + 0 + 525 = 666.

It is not a de Polignac number, because 531240810525 - 2³ = 531240810517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531240810525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9808419 + ... + 9862431.

It is an arithmetic number, because the mean of its divisors is an integer number (13713614460).

Almost surely, 2^531240810525 is an apocalyptic number.

It is an amenable number.

531240810525 is a deficient number, since it is larger than the sum of its proper divisors (456139430595).

531240810525 is a wasteful number, since it uses less digits than its factorization.

531240810525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55657 (or 55640 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 531240810525 in words is "five hundred thirty-one billion, two hundred forty million, eight hundred ten thousand, five hundred twenty-five".