531256115516 has 12 divisors (see below), whose sum is σ = 1062512231088. Its totient is φ = 227681192352.

The previous prime is 531256115503. The next prime is 531256115549. The reversal of 531256115516 is 615511652135.

531256115516 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 9486716321 + ... + 9486716376.

It is an arithmetic number, because the mean of its divisors is an integer number (88542685924).

Almost surely, 2^531256115516 is an apocalyptic number.

It is an amenable number.

531256115516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531256115516 is a wasteful number, since it uses less digits than its factorization.

531256115516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18973432708 (or 18973432706 counting only the distinct ones).

The product of its digits is 135000, while the sum is 41.

The spelling of 531256115516 in words is "five hundred thirty-one billion, two hundred fifty-six million, one hundred fifteen thousand, five hundred sixteen".