1316540217 has 16 divisors (see below), whose sum is σ = 1876387968. Its totient is φ = 819054720.

The previous prime is 1316540189. The next prime is 1316540261. The reversal of 1316540217 is 7120456131.

It is not a de Polignac number, because 1316540217 - 2⁷ = 1316540089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1316540297) 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, 229858 + ... + 235515.

It is an arithmetic number, because the mean of its divisors is an integer number (117274248).

Almost surely, 2^1316540217 is an apocalyptic number.

It is an amenable number.

1316540217 is a deficient number, since it is larger than the sum of its proper divisors (559847751).

1316540217 is a wasteful number, since it uses less digits than its factorization.

1316540217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465440.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1316540217 is about 36284.1593122949. The cubic root of 1316540217 is about 1096.0020759480.

Adding to 1316540217 its reverse (7120456131), we get a palindrome (8436996348).

The spelling of 1316540217 in words is "one billion, three hundred sixteen million, five hundred forty thousand, two hundred seventeen".