1315121313 has 16 divisors (see below), whose sum is σ = 1915273152. Its totient is φ = 796056000.

The previous prime is 1315121299. The next prime is 1315121317. The reversal of 1315121313 is 3131215131.

It is not a de Polignac number, because 1315121313 - 2¹² = 1315117217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1315121313.

It is not an unprimeable number, because it can be changed into a prime (1315121317) 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 in 15 ways as a sum of consecutive naturals, for example, 2823 + ... + 51363.

It is an arithmetic number, because the mean of its divisors is an integer number (119704572).

Almost surely, 2^1315121313 is an apocalyptic number.

It is an amenable number.

1315121313 is a deficient number, since it is larger than the sum of its proper divisors (600151839).

1315121313 is a wasteful number, since it uses less digits than its factorization.

1315121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49376.

The product of its digits is 270, while the sum is 21.

The square root of 1315121313 is about 36264.6013765490. The cubic root of 1315121313 is about 1095.6081948945.

Adding to 1315121313 its reverse (3131215131), we get a palindrome (4446336444).

The spelling of 1315121313 in words is "one billion, three hundred fifteen million, one hundred twenty-one thousand, three hundred thirteen".