2218087 has 4 divisors (see below), whose sum is σ = 2227176. Its totient is φ = 2209000.

The previous prime is 2218067. The next prime is 2218091. The reversal of 2218087 is 7808122.

2218087 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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218087 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 (2218037) 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 3 ways as a sum of consecutive naturals, for example, 4168 + ... + 4669.

It is an arithmetic number, because the mean of its divisors is an integer number (556794).

2^2218087 is an apocalyptic number.

2218087 is a deficient number, since it is larger than the sum of its proper divisors (9089).

2218087 is an equidigital number, since it uses as much as digits as its factorization.

2218087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2218087 is about 1489.3243434524. The cubic root of 2218087 is about 130.4145935403.

It can be divided in two parts, 2 and 218087, that added together give a square (218089 = 467²).

The spelling of 2218087 in words is "two million, two hundred eighteen thousand, eighty-seven".