531243252315 has 24 divisors (see below), whose sum is σ = 921020068800. Its totient is φ = 283268678784.

The previous prime is 531243252311. The next prime is 531243252329. The reversal of 531243252315 is 513252342135.

531243252315 is a `hidden beast` number, since 5 + 3 + 12 + 4 + 325 + 2 + 315 = 666.

It is not a de Polignac number, because 531243252315 - 2² = 531243252311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531243252315.

It is not an unprimeable number, because it can be changed into a prime (531243252311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1060467 + ... + 1478876.

It is an arithmetic number, because the mean of its divisors is an integer number (38375836200).

Almost surely, 2^531243252315 is an apocalyptic number.

531243252315 is a deficient number, since it is larger than the sum of its proper divisors (389776816485).

531243252315 is a wasteful number, since it uses less digits than its factorization.

531243252315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544003 (or 2544000 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 531243252315 in words is "five hundred thirty-one billion, two hundred forty-three million, two hundred fifty-two thousand, three hundred fifteen".