2218345 has 12 divisors (see below), whose sum is σ = 2811780. Its totient is φ = 1679904.

The previous prime is 2218343. The next prime is 2218351. The reversal of 2218345 is 5438122.

2218345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1669264 + 549081 = 1292^2 + 741^2 .

It is not a de Polignac number, because 2218345 - 2¹ = 2218343 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 2¹¹ + 1 + 8³ + 3 + 4⁹ + 5⁹ .

It is not an unprimeable number, because it can be changed into a prime (2218343) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1191 + ... + 2419.

It is an arithmetic number, because the mean of its divisors is an integer number (234315).

2^2218345 is an apocalyptic number.

It is an amenable number.

2218345 is a deficient number, since it is larger than the sum of its proper divisors (593435).

2218345 is a wasteful number, since it uses less digits than its factorization.

2218345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272 (or 1253 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 2218345 is about 1489.4109573922. The cubic root of 2218345 is about 130.4196497983.

The spelling of 2218345 in words is "two million, two hundred eighteen thousand, three hundred forty-five".