2218564 has 6 divisors (see below), whose sum is σ = 3882494. Its totient is φ = 1109280.

The previous prime is 2218561. The next prime is 2218583. The reversal of 2218564 is 4658122.

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 280900 = 1392^2 + 530^2 .

It is not an unprimeable number, because it can be changed into a prime (2218561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277317 + ... + 277324.

2^2218564 is an apocalyptic number.

It is an amenable number.

2218564 is a deficient number, since it is larger than the sum of its proper divisors (1663930).

2218564 is a wasteful number, since it uses less digits than its factorization.

2218564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554645 (or 554643 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 2218564 is about 1489.4844745750. The cubic root of 2218564 is about 130.4239414307.

The spelling of 2218564 in words is "two million, two hundred eighteen thousand, five hundred sixty-four".