2218687 has 8 divisors (see below), whose sum is σ = 2473200. Its totient is φ = 1977984.

The previous prime is 2218669. The next prime is 2218691. The reversal of 2218687 is 7868122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2218687 - 2¹⁵ = 2185919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3112 + ... + 3757.

It is an arithmetic number, because the mean of its divisors is an integer number (309150).

2^2218687 is an apocalyptic number.

2218687 is a deficient number, since it is larger than the sum of its proper divisors (254513).

2218687 is a wasteful number, since it uses less digits than its factorization.

2218687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6905.

The product of its digits is 10752, while the sum is 34.

The square root of 2218687 is about 1489.5257634563. The cubic root of 2218687 is about 130.4263516757.

It can be divided in two parts, 22 and 18687, that multiplied together give a palindrome (411114).

The spelling of 2218687 in words is "two million, two hundred eighteen thousand, six hundred eighty-seven".