1315515253 has 4 divisors (see below), whose sum is σ = 1416708748. Its totient is φ = 1214321760.

The previous prime is 1315515239. The next prime is 1315515259. The reversal of 1315515253 is 3525155131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 898620529 + 416894724 = 29977^2 + 20418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315515253 - 2⁵ = 1315515221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 50596728 + ... + 50596753.

It is an arithmetic number, because the mean of its divisors is an integer number (354177187).

Almost surely, 2^1315515253 is an apocalyptic number.

1315515253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1315515253 is a deficient number, since it is larger than the sum of its proper divisors (101193495).

1315515253 is a wasteful number, since it uses less digits than its factorization.

1315515253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101193494.

The product of its digits is 11250, while the sum is 31.

The square root of 1315515253 is about 36270.0324372615. The cubic root of 1315515253 is about 1095.7175791772.

The spelling of 1315515253 in words is "one billion, three hundred fifteen million, five hundred fifteen thousand, two hundred fifty-three".