2216879 has 4 divisors (see below), whose sum is σ = 2533584. Its totient is φ = 1900176.

The previous prime is 2216873. The next prime is 2216887. The reversal of 2216879 is 9786122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2216879 - 2¹² = 2212783 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216873) 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 3 ways as a sum of consecutive naturals, for example, 158342 + ... + 158355.

It is an arithmetic number, because the mean of its divisors is an integer number (633396).

2^2216879 is an apocalyptic number.

2216879 is a deficient number, since it is larger than the sum of its proper divisors (316705).

2216879 is an equidigital number, since it uses as much as digits as its factorization.

2216879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316704.

The product of its digits is 12096, while the sum is 35.

The square root of 2216879 is about 1488.9187351901. The cubic root of 2216879 is about 130.3909140607.

The spelling of 2216879 in words is "two million, two hundred sixteen thousand, eight hundred seventy-nine".