2217116656 has 20 divisors (see below), whose sum is σ = 4400437104. Its totient is φ = 1081520000.

The previous prime is 2217116639. The next prime is 2217116711. The reversal of 2217116656 is 6566117122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689220 + ... + 1690531.

Almost surely, 2^2217116656 is an apocalyptic number.

It is an amenable number.

2217116656 is a deficient number, since it is larger than the sum of its proper divisors (2183320448).

2217116656 is a wasteful number, since it uses less digits than its factorization.

2217116656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379800 (or 3379794 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 2217116656 is about 47086.2682318317. The cubic root of 2217116656 is about 1303.9557332508.

The spelling of 2217116656 in words is "two billion, two hundred seventeen million, one hundred sixteen thousand, six hundred fifty-six".