2216806729 has 2 divisors, whose sum is σ = 2216806730. Its totient is φ = 2216806728.

The previous prime is 2216806687. The next prime is 2216806733. The reversal of 2216806729 is 9276086122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2131207225 + 85599504 = 46165^2 + 9252^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216806729 - 2²⁷ = 2082589001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2216806799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108403364 + 1108403365.

It is an arithmetic number, because the mean of its divisors is an integer number (1108403365).

Almost surely, 2^2216806729 is an apocalyptic number.

It is an amenable number.

2216806729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216806729 is an equidigital number, since it uses as much as digits as its factorization.

2216806729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 2216806729 is about 47082.9770617789. The cubic root of 2216806729 is about 1303.8949711615.

The spelling of 2216806729 in words is "two billion, two hundred sixteen million, eight hundred six thousand, seven hundred twenty-nine".