1315161517 has 2 divisors, whose sum is σ = 1315161518. Its totient is φ = 1315161516.

The previous prime is 1315161499. The next prime is 1315161539. The reversal of 1315161517 is 7151615131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1237210276 + 77951241 = 35174^2 + 8829^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315161517 - 2¹⁹ = 1314637229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315161587) 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 as a sum of consecutive naturals, namely, 657580758 + 657580759.

It is an arithmetic number, because the mean of its divisors is an integer number (657580759).

Almost surely, 2^1315161517 is an apocalyptic number.

It is an amenable number.

1315161517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315161517 is an equidigital number, since it uses as much as digits as its factorization.

1315161517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 31.

The square root of 1315161517 is about 36265.1556869676. The cubic root of 1315161517 is about 1095.6193592341.

Adding to 1315161517 its reverse (7151615131), we get a palindrome (8466776648).

The spelling of 1315161517 in words is "one billion, three hundred fifteen million, one hundred sixty-one thousand, five hundred seventeen".