2218554 has 48 divisors (see below), whose sum is σ = 5460000. Its totient is φ = 645408.

The previous prime is 2218549. The next prime is 2218561. The reversal of 2218554 is 4558122.

It is a happy number.

2218554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4197 + ... + 4695.

It is an arithmetic number, because the mean of its divisors is an integer number (113750).

2^2218554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2218554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2730000).

2218554 is an abundant number, since it is smaller than the sum of its proper divisors (3241446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2218554 is a wasteful number, since it uses less digits than its factorization.

2218554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 536 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2218554 is about 1489.4811177051. The cubic root of 2218554 is about 130.4237454719.

It can be divided in two parts, 2218 and 554, that added together give a palindrome (2772).

The spelling of 2218554 in words is "two million, two hundred eighteen thousand, five hundred fifty-four".