2218305 has 16 divisors (see below), whose sum is σ = 3636864. Its totient is φ = 1153920.

The previous prime is 2218289. The next prime is 2218319. The reversal of 2218305 is 5038122.

It is not a de Polignac number, because 2218305 - 2⁴ = 2218289 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (227304).

2^2218305 is an apocalyptic number.

It is an amenable number.

2218305 is a deficient number, since it is larger than the sum of its proper divisors (1418559).

2218305 is a wasteful number, since it uses less digits than its factorization.

2218305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2218305 is about 1489.3975292043. The cubic root of 2218305 is about 130.4188659080.

The spelling of 2218305 in words is "two million, two hundred eighteen thousand, three hundred five".