1315225913 has 2 divisors, whose sum is σ = 1315225914. Its totient is φ = 1315225912.

The previous prime is 1315225903. The next prime is 1315225963. The reversal of 1315225913 is 3195225131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255426624 + 59799289 = 35432^2 + 7733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315225913 - 2²² = 1311031609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1315225913.

It is not a weakly prime, because it can be changed into another prime (1315225903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657612956 + 657612957.

It is an arithmetic number, because the mean of its divisors is an integer number (657612957).

Almost surely, 2^1315225913 is an apocalyptic number.

It is an amenable number.

1315225913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315225913 is an equidigital number, since it uses as much as digits as its factorization.

1315225913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 1315225913 is about 36266.0435255902. The cubic root of 1315225913 is about 1095.6372410309.

The spelling of 1315225913 in words is "one billion, three hundred fifteen million, two hundred twenty-five thousand, nine hundred thirteen".