15323515313 has 2 divisors, whose sum is σ = 15323515314. Its totient is φ = 15323515312.

The previous prime is 15323515271. The next prime is 15323515321. The reversal of 15323515313 is 31351532351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15245581729 + 77933584 = 123473^2 + 8828^2 .

It is a cyclic number.

It is not a de Polignac number, because 15323515313 - 2⁸ = 15323515057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15323515313.

It is not a weakly prime, because it can be changed into another prime (15323515393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7661757656 + 7661757657.

It is an arithmetic number, because the mean of its divisors is an integer number (7661757657).

Almost surely, 2^15323515313 is an apocalyptic number.

It is an amenable number.

15323515313 is a deficient number, since it is larger than the sum of its proper divisors (1).

15323515313 is an equidigital number, since it uses as much as digits as its factorization.

15323515313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 32.

The spelling of 15323515313 in words is "fifteen billion, three hundred twenty-three million, five hundred fifteen thousand, three hundred thirteen".