2216205 has 24 divisors (see below), whose sum is σ = 4068792. Its totient is φ = 1112064.

The previous prime is 2216197. The next prime is 2216213. The reversal of 2216205 is 5026122.

It is an interprime number because it is at equal distance from previous prime (2216197) and next prime (2216213).

It can be written as a sum of positive squares in 4 ways, for example, as 133956 + 2082249 = 366^2 + 1443^2 .

It is not a de Polignac number, because 2216205 - 2³ = 2216197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 684 + ... + 2213.

It is an arithmetic number, because the mean of its divisors is an integer number (169533).

2^2216205 is an apocalyptic number.

It is an amenable number.

2216205 is a deficient number, since it is larger than the sum of its proper divisors (1852587).

2216205 is a wasteful number, since it uses less digits than its factorization.

2216205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925 (or 2922 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2216205 is about 1488.6923792376. The cubic root of 2216205 is about 130.3776984268.

The spelling of 2216205 in words is "two million, two hundred sixteen thousand, two hundred five".