2218165 has 8 divisors (see below), whose sum is σ = 2718720. Its totient is φ = 1736592.

The previous prime is 2218157. The next prime is 2218171. The reversal of 2218165 is 5618122.

2218165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2218165 - 2³ = 2218157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4485 + ... + 4954.

It is an arithmetic number, because the mean of its divisors is an integer number (339840).

2^2218165 is an apocalyptic number.

It is an amenable number.

2218165 is a deficient number, since it is larger than the sum of its proper divisors (500555).

2218165 is an equidigital number, since it uses as much as digits as its factorization.

2218165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491.

The product of its digits is 960, while the sum is 25.

The square root of 2218165 is about 1489.3505295934. The cubic root of 2218165 is about 130.4161222178.

The spelling of 2218165 in words is "two million, two hundred eighteen thousand, one hundred sixty-five".