15717457313 has 2 divisors, whose sum is σ = 15717457314. Its totient is φ = 15717457312.

The previous prime is 15717457277. The next prime is 15717457331. The reversal of 15717457313 is 31375471751.

Together with next prime (15717457331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15569299729 + 148157584 = 124777^2 + 12172^2 .

It is a cyclic number.

It is not a de Polignac number, because 15717457313 - 2⁸ = 15717457057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15717457363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7858728656 + 7858728657.

It is an arithmetic number, because the mean of its divisors is an integer number (7858728657).

Almost surely, 2^15717457313 is an apocalyptic number.

It is an amenable number.

15717457313 is a deficient number, since it is larger than the sum of its proper divisors (1).

15717457313 is an equidigital number, since it uses as much as digits as its factorization.

15717457313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308700, while the sum is 44.

The spelling of 15717457313 in words is "fifteen billion, seven hundred seventeen million, four hundred fifty-seven thousand, three hundred thirteen".