2216722217 has 16 divisors (see below), whose sum is σ = 2276812800. Its totient is φ = 2157509520.

The previous prime is 2216722201. The next prime is 2216722237. The reversal of 2216722217 is 7122276122.

It is a cyclic number.

It is not a de Polignac number, because 2216722217 - 2⁴ = 2216722201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216722237) 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 15 ways as a sum of consecutive naturals, for example, 4551548 + ... + 4552034.

It is an arithmetic number, because the mean of its divisors is an integer number (142300800).

Almost surely, 2^2216722217 is an apocalyptic number.

It is an amenable number.

2216722217 is a deficient number, since it is larger than the sum of its proper divisors (60090583).

2216722217 is a wasteful number, since it uses less digits than its factorization.

2216722217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156.

The product of its digits is 9408, while the sum is 32.

The square root of 2216722217 is about 47082.0795738676. The cubic root of 2216722217 is about 1303.8784013555.

Adding to 2216722217 its reverse (7122276122), we get a palindrome (9338998339).

The spelling of 2216722217 in words is "two billion, two hundred sixteen million, seven hundred twenty-two thousand, two hundred seventeen".