1315117217 has 2 divisors, whose sum is σ = 1315117218. Its totient is φ = 1315117216.

The previous prime is 1315117211. The next prime is 1315117231. The reversal of 1315117217 is 7127115131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684554896 + 630562321 = 26164^2 + 25111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315117217 - 2¹⁴ = 1315100833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1315117217.

It is not a weakly prime, because it can be changed into another prime (1315117211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657558608 + 657558609.

It is an arithmetic number, because the mean of its divisors is an integer number (657558609).

Almost surely, 2^1315117217 is an apocalyptic number.

It is an amenable number.

1315117217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315117217 is an equidigital number, since it uses as much as digits as its factorization.

1315117217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1470, while the sum is 29.

The square root of 1315117217 is about 36264.5449027008. The cubic root of 1315117217 is about 1095.6070574542.

The spelling of 1315117217 in words is "one billion, three hundred fifteen million, one hundred seventeen thousand, two hundred seventeen".