8162116217 has 4 divisors (see below), whose sum is σ = 8162362740. Its totient is φ = 8161869696.

The previous prime is 8162116213. The next prime is 8162116247. The reversal of 8162116217 is 7126112618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7126112618 = 2 ⋅3563056309.

It can be written as a sum of positive squares in 2 ways, for example, as 6368678416 + 1793437801 = 79804^2 + 42349^2 .

It is a cyclic number.

It is not a de Polignac number, because 8162116217 - 2² = 8162116213 is a prime.

It is a super-2 number, since 2×8162116217² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8162116213) 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 3 ways as a sum of consecutive naturals, for example, 64148 + ... + 142965.

It is an arithmetic number, because the mean of its divisors is an integer number (2040590685).

Almost surely, 2^8162116217 is an apocalyptic number.

It is an amenable number.

8162116217 is a deficient number, since it is larger than the sum of its proper divisors (246523).

8162116217 is a wasteful number, since it uses less digits than its factorization.

8162116217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246522.

The product of its digits is 8064, while the sum is 35.

The square root of 8162116217 is about 90344.4310237217. The cubic root of 8162116217 is about 2013.4194426468.

The spelling of 8162116217 in words is "eight billion, one hundred sixty-two million, one hundred sixteen thousand, two hundred seventeen".