2216816 has 20 divisors (see below), whose sum is σ = 4908912. Its totient is φ = 950016.

The previous prime is 2216803. The next prime is 2216821. The reversal of 2216816 is 6186122.

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, 9785 + ... + 10008.

2^2216816 is an apocalyptic number.

It is an amenable number.

2216816 is an abundant number, since it is smaller than the sum of its proper divisors (2692096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2216816 is a wasteful number, since it uses less digits than its factorization.

2216816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808 (or 19802 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 2216816 is about 1488.8975787474. The cubic root of 2216816 is about 130.3896788850.

The spelling of 2216816 in words is "two million, two hundred sixteen thousand, eight hundred sixteen".