2220564 has 24 divisors (see below), whose sum is σ = 5211808. Its totient is φ = 735840.

The previous prime is 2220553. The next prime is 2220643. The reversal of 2220564 is 4650222.

It is a self number, because there is not a number n which added to its sum of digits gives 2220564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2094 + ... + 2970.

2^2220564 is an apocalyptic number.

It is an amenable number.

2220564 is an abundant number, since it is smaller than the sum of its proper divisors (2991244).

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

2220564 is a wasteful number, since it uses less digits than its factorization.

2220564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2220564 is about 1490.1556965633. The cubic root of 2220564 is about 130.4631213595.

Adding to 2220564 its reverse (4650222), we get a palindrome (6870786).

The spelling of 2220564 in words is "two million, two hundred twenty thousand, five hundred sixty-four".