2216808965 has 16 divisors (see below), whose sum is σ = 3058854528. Its totient is φ = 1510767936.

The previous prime is 2216808943. The next prime is 2216809019. The reversal of 2216808965 is 5698086122.

It is a cyclic number.

It is not a de Polignac number, because 2216808965 - 2⁸ = 2216808709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188582 + ... + 199991.

It is an arithmetic number, because the mean of its divisors is an integer number (191178408).

Almost surely, 2^2216808965 is an apocalyptic number.

It is an amenable number.

2216808965 is a deficient number, since it is larger than the sum of its proper divisors (842045563).

2216808965 is a wasteful number, since it uses less digits than its factorization.

2216808965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388748.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 2216808965 is about 47083.0008070854. Note that the first 3 decimals coincide. The cubic root of 2216808965 is about 1303.8954095561.

The spelling of 2216808965 in words is "two billion, two hundred sixteen million, eight hundred eight thousand, nine hundred sixty-five".