2118218 has 16 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 1003632.

The previous prime is 2118209. The next prime is 2118239. The reversal of 2118218 is 8128112.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2118193 and 2118202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3113 + ... + 3731.

It is an arithmetic number, because the mean of its divisors is an integer number (209250).

2^2118218 is an apocalyptic number.

2118218 is a deficient number, since it is larger than the sum of its proper divisors (1229782).

2118218 is a wasteful number, since it uses less digits than its factorization.

2118218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its digits is 256, while the sum is 23.

The square root of 2118218 is about 1455.4099078954. The cubic root of 2118218 is about 128.4271617567.

The spelling of 2118218 in words is "two million, one hundred eighteen thousand, two hundred eighteen".