2206620217 has 2 divisors, whose sum is σ = 2206620218. Its totient is φ = 2206620216.

The previous prime is 2206620203. The next prime is 2206620223. The reversal of 2206620217 is 7120266022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1945603881 + 261016336 = 44109^2 + 16156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2206620217 is a prime.

It is not a weakly prime, because it can be changed into another prime (2206690217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103310108 + 1103310109.

It is an arithmetic number, because the mean of its divisors is an integer number (1103310109).

Almost surely, 2^2206620217 is an apocalyptic number.

It is an amenable number.

2206620217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2206620217 is an equidigital number, since it uses as much as digits as its factorization.

2206620217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 2206620217 is about 46974.6763373629. The cubic root of 2206620217 is about 1301.8947158580.

Adding to 2206620217 its reverse (7120266022), we get a palindrome (9326886239).

The spelling of 2206620217 in words is "two billion, two hundred six million, six hundred twenty thousand, two hundred seventeen".