2216091 has 16 divisors (see below), whose sum is σ = 3104640. Its totient is φ = 1404480.

The previous prime is 2216087. The next prime is 2216101. The reversal of 2216091 is 1906122.

It is not a de Polignac number, because 2216091 - 2² = 2216087 is a prime.

It is a super-2 number, since 2×2216091² = 9822118640562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2216021) 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, 5080 + ... + 5498.

It is an arithmetic number, because the mean of its divisors is an integer number (194040).

2^2216091 is an apocalyptic number.

2216091 is a deficient number, since it is larger than the sum of its proper divisors (888549).

2216091 is a wasteful number, since it uses less digits than its factorization.

2216091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2216091 is about 1488.6540901096. The cubic root of 2216091 is about 130.3754628766.

The spelling of 2216091 in words is "two million, two hundred sixteen thousand, ninety-one".