12315544213 has 12 divisors (see below), whose sum is σ = 14345831820. Its totient is φ = 10541748672.

The previous prime is 12315544177. The next prime is 12315544291. The reversal of 12315544213 is 31244551321.

It can be written as a sum of positive squares in 2 ways, for example, as 5887032529 + 6428511684 = 76727^2 + 80178^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12315544213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315547213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135528 + ... + 207361.

It is an arithmetic number, because the mean of its divisors is an integer number (1195485985).

Almost surely, 2^12315544213 is an apocalyptic number.

It is an amenable number.

12315544213 is a deficient number, since it is larger than the sum of its proper divisors (2030287607).

12315544213 is an equidigital number, since it uses as much as digits as its factorization.

12315544213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343636 (or 343629 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The spelling of 12315544213 in words is "twelve billion, three hundred fifteen million, five hundred forty-four thousand, two hundred thirteen".