12318715531 has 16 divisors (see below), whose sum is σ = 13023188640. Its totient is φ = 11619970560.

The previous prime is 12318715523. The next prime is 12318715543. The reversal of 12318715531 is 13551781321.

12318715531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12318715531 - 2³ = 12318715523 is a prime.

It is a super-2 number, since 2×12318715531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12318715501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6242661 + ... + 6244633.

It is an arithmetic number, because the mean of its divisors is an integer number (813949290).

Almost surely, 2^12318715531 is an apocalyptic number.

12318715531 is a deficient number, since it is larger than the sum of its proper divisors (704473109).

12318715531 is a wasteful number, since it uses less digits than its factorization.

12318715531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246.

The product of its digits is 25200, while the sum is 37.

The spelling of 12318715531 in words is "twelve billion, three hundred eighteen million, seven hundred fifteen thousand, five hundred thirty-one".