2216549881 has 16 divisors (see below), whose sum is σ = 2765440384. Its totient is φ = 1729724544.

The previous prime is 2216549869. The next prime is 2216549891. The reversal of 2216549881 is 1889456122.

It is a cyclic number.

It is not a de Polignac number, because 2216549881 - 2⁵ = 2216549849 is a prime.

It is a super-2 number, since 2×2216549881² = 9826186749922228322, which contains 22 as substring.

It is a deceptive number, since it divides R_2216549880.

It is not an unprimeable number, because it can be changed into a prime (2216549801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160191 + ... + 173476.

It is an arithmetic number, because the mean of its divisors is an integer number (172840024).

Almost surely, 2^2216549881 is an apocalyptic number.

It is an amenable number.

2216549881 is a deficient number, since it is larger than the sum of its proper divisors (548890503).

2216549881 is a wasteful number, since it uses less digits than its factorization.

2216549881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333760.

The product of its digits is 276480, while the sum is 46.

The square root of 2216549881 is about 47080.2493727465. The cubic root of 2216549881 is about 1303.8446110728.

The spelling of 2216549881 in words is "two billion, two hundred sixteen million, five hundred forty-nine thousand, eight hundred eighty-one".