1315515239 has 2 divisors, whose sum is σ = 1315515240. Its totient is φ = 1315515238.

The previous prime is 1315515221. The next prime is 1315515259. The reversal of 1315515239 is 9325155131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315515239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1315515199 and 1315515208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315515259) 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, 657757619 + 657757620.

It is an arithmetic number, because the mean of its divisors is an integer number (657757620).

Almost surely, 2^1315515239 is an apocalyptic number.

1315515239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315515239 is an equidigital number, since it uses as much as digits as its factorization.

1315515239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 35.

The square root of 1315515239 is about 36270.0322442647. The cubic root of 1315515239 is about 1095.7175752902.

The spelling of 1315515239 in words is "one billion, three hundred fifteen million, five hundred fifteen thousand, two hundred thirty-nine".