531242243405 has 16 divisors (see below), whose sum is σ = 638206525440. Its totient is φ = 424516739712.

The previous prime is 531242243381. The next prime is 531242243417. The reversal of 531242243405 is 504342242135.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 531242243405 - 2²⁰ = 531241194829 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 50306516 + ... + 50317074.

It is an arithmetic number, because the mean of its divisors is an integer number (39887907840).

Almost surely, 2^531242243405 is an apocalyptic number.

It is an amenable number.

531242243405 is a deficient number, since it is larger than the sum of its proper divisors (106964282035).

531242243405 is a wasteful number, since it uses less digits than its factorization.

531242243405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20908.

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 531242243405 in words is "five hundred thirty-one billion, two hundred forty-two million, two hundred forty-three thousand, four hundred five".