2218144 has 12 divisors (see below), whose sum is σ = 4367034. Its totient is φ = 1109056.

The previous prime is 2218129. The next prime is 2218157. The reversal of 2218144 is 4418122.

It can be written as a sum of positive squares in only one way, i.e., 1926544 + 291600 = 1388^2 + 540^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34627 + ... + 34690.

2^2218144 is an apocalyptic number.

It is an amenable number.

2218144 is a deficient number, since it is larger than the sum of its proper divisors (2148890).

2218144 is an equidigital number, since it uses as much as digits as its factorization.

2218144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69327 (or 69319 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The square root of 2218144 is about 1489.3434795238. The cubic root of 2218144 is about 130.4157106543.

Subtracting from 2218144 its sum of digits (22), we obtain a palindrome (2218122).

The spelling of 2218144 in words is "two million, two hundred eighteen thousand, one hundred forty-four".