2216191 has 8 divisors (see below), whose sum is σ = 2303424. Its totient is φ = 2130720.

The previous prime is 2216167. The next prime is 2216197. The reversal of 2216191 is 1916122.

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 2216191 - 2²¹ = 119039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2481 + ... + 3253.

It is an arithmetic number, because the mean of its divisors is an integer number (287928).

2^2216191 is an apocalyptic number.

2216191 is a deficient number, since it is larger than the sum of its proper divisors (87233).

2216191 is an equidigital number, since it uses as much as digits as its factorization.

2216191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its digits is 216, while the sum is 22.

The square root of 2216191 is about 1488.6876771170. The cubic root of 2216191 is about 130.3774238897.

The spelling of 2216191 in words is "two million, two hundred sixteen thousand, one hundred ninety-one".