2115218 has 16 divisors (see below), whose sum is σ = 3784320. Its totient is φ = 866976.

The previous prime is 2115203. The next prime is 2115221. The reversal of 2115218 is 8125112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2115218.

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, 2963 + ... + 3606.

It is an arithmetic number, because the mean of its divisors is an integer number (236520).

2^2115218 is an apocalyptic number.

2115218 is a deficient number, since it is larger than the sum of its proper divisors (1669102).

2115218 is a wasteful number, since it uses less digits than its factorization.

2115218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601.

The product of its digits is 160, while the sum is 20.

The square root of 2115218 is about 1454.3789052376. The cubic root of 2115218 is about 128.3665032979.

The spelling of 2115218 in words is "two million, one hundred fifteen thousand, two hundred eighteen".