1317957915 has 32 divisors (see below), whose sum is σ = 2182533696. Its totient is φ = 678666240.

The previous prime is 1317957911. The next prime is 1317957923. The reversal of 1317957915 is 5197597131.

1317957915 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1317957915 - 2² = 1317957911 is a prime.

It is a super-2 number, since 2×1317957915² = 3474026131422294450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1317957911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48609 + ... + 70701.

It is an arithmetic number, because the mean of its divisors is an integer number (68204178).

Almost surely, 2^1317957915 is an apocalyptic number.

1317957915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1317957915 is a deficient number, since it is larger than the sum of its proper divisors (864575781).

1317957915 is a wasteful number, since it uses less digits than its factorization.

1317957915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22239.

The product of its digits is 297675, while the sum is 48.

The square root of 1317957915 is about 36303.6901016963. The cubic root of 1317957915 is about 1096.3953396795.

The spelling of 1317957915 in words is "one billion, three hundred seventeen million, nine hundred fifty-seven thousand, nine hundred fifteen".