1315972563 has 16 divisors (see below), whose sum is σ = 1804467456. Its totient is φ = 852706400.

The previous prime is 1315972523. The next prime is 1315972571. The reversal of 1315972563 is 3652795131.

It is not a de Polignac number, because 1315972563 - 2¹⁰ = 1315971539 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1315972523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21663 + ... + 55688.

It is an arithmetic number, because the mean of its divisors is an integer number (112779216).

Almost surely, 2^1315972563 is an apocalyptic number.

1315972563 is a deficient number, since it is larger than the sum of its proper divisors (488494893).

1315972563 is a wasteful number, since it uses less digits than its factorization.

1315972563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77514.

The product of its digits is 170100, while the sum is 42.

The square root of 1315972563 is about 36276.3361297692. The cubic root of 1315972563 is about 1095.8445318554.

The spelling of 1315972563 in words is "one billion, three hundred fifteen million, nine hundred seventy-two thousand, five hundred sixty-three".