2218318 has 4 divisors (see below), whose sum is σ = 3327480. Its totient is φ = 1109158.

The previous prime is 2218289. The next prime is 2218319. The reversal of 2218318 is 8138122.

2218318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 2218292 and 2218301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218319) 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 as a sum of consecutive naturals, namely, 554578 + ... + 554581.

It is an arithmetic number, because the mean of its divisors is an integer number (831870).

2^2218318 is an apocalyptic number.

2218318 is a deficient number, since it is larger than the sum of its proper divisors (1109162).

2218318 is a wasteful number, since it uses less digits than its factorization.

2218318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109161.

The product of its digits is 768, while the sum is 25.

The square root of 2218318 is about 1489.4018933787. The cubic root of 2218318 is about 130.4191206734.

It can be divided in two parts, 22183 and 18, that added together give a square (22201 = 149²).

The spelling of 2218318 in words is "two million, two hundred eighteen thousand, three hundred eighteen".