2218544 has 20 divisors (see below), whose sum is σ = 4321896. Its totient is φ = 1103232.

The previous prime is 2218523. The next prime is 2218547. The reversal of 2218544 is 4458122.

It is a happy number.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2218547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4787 + ... + 5229.

2^2218544 is an apocalyptic number.

It is an amenable number.

2218544 is a deficient number, since it is larger than the sum of its proper divisors (2103352).

2218544 is a wasteful number, since it uses less digits than its factorization.

2218544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 758 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 2218544 is about 1489.4777608276. The cubic root of 2218544 is about 130.4235495125.

The spelling of 2218544 in words is "two million, two hundred eighteen thousand, five hundred forty-four".