2216189 has 8 divisors (see below), whose sum is σ = 2305080. Its totient is φ = 2128896.

The previous prime is 2216167. The next prime is 2216197. The reversal of 2216189 is 9816122.

It can be written as a sum of positive squares in 4 ways, for example, as 284089 + 1932100 = 533^2 + 1390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2216189 - 2²⁰ = 1167613 is a prime.

It is a super-2 number, since 2×2216189² = 9822987367442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2957 + ... + 3629.

It is an arithmetic number, because the mean of its divisors is an integer number (288135).

2^2216189 is an apocalyptic number.

It is an amenable number.

2216189 is a deficient number, since it is larger than the sum of its proper divisors (88891).

2216189 is an equidigital number, since it uses as much as digits as its factorization.

2216189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799.

The product of its digits is 1728, while the sum is 29.

The square root of 2216189 is about 1488.6870053843. The cubic root of 2216189 is about 130.3773846700.

The spelling of 2216189 in words is "two million, two hundred sixteen thousand, one hundred eighty-nine".