12312215717 has 2 divisors, whose sum is σ = 12312215718. Its totient is φ = 12312215716.

The previous prime is 12312215689. The next prime is 12312215749. The reversal of 12312215717 is 71751221321.

It is an a-pointer prime, because the next prime (12312215749) can be obtained adding 12312215717 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9293152801 + 3019062916 = 96401^2 + 54946^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312215717 - 2⁶ = 12312215653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12312218717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156107858 + 6156107859.

It is an arithmetic number, because the mean of its divisors is an integer number (6156107859).

Almost surely, 2^12312215717 is an apocalyptic number.

It is an amenable number.

12312215717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312215717 is an equidigital number, since it uses as much as digits as its factorization.

12312215717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The spelling of 12312215717 in words is "twelve billion, three hundred twelve million, two hundred fifteen thousand, seven hundred seventeen".