1315111513 has 2 divisors, whose sum is σ = 1315111514. Its totient is φ = 1315111512.

The previous prime is 1315111493. The next prime is 1315111537. The reversal of 1315111513 is 3151115131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1273276489 + 41835024 = 35683^2 + 6468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315111513 - 2¹⁷ = 1314980441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315111583) 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, 657555756 + 657555757.

It is an arithmetic number, because the mean of its divisors is an integer number (657555757).

Almost surely, 2^1315111513 is an apocalyptic number.

It is an amenable number.

1315111513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315111513 is an equidigital number, since it uses as much as digits as its factorization.

1315111513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225, while the sum is 22.

The square root of 1315111513 is about 36264.4662583086. The cubic root of 1315111513 is about 1095.6054734759.

Adding to 1315111513 its reverse (3151115131), we get a palindrome (4466226644).

The spelling of 1315111513 in words is "one billion, three hundred fifteen million, one hundred eleven thousand, five hundred thirteen".