220005564 has 12 divisors (see below), whose sum is σ = 513346344. Its totient is φ = 73335184.

The previous prime is 220005553. The next prime is 220005601. The reversal of 220005564 is 465500022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166887 + ... + 9166910.

It is an arithmetic number, because the mean of its divisors is an integer number (42778862).

Almost surely, 2^220005564 is an apocalyptic number.

It is an amenable number.

220005564 is an abundant number, since it is smaller than the sum of its proper divisors (293340780).

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

220005564 is a wasteful number, since it uses less digits than its factorization.

220005564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333804 (or 18333802 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 220005564 is about 14832.5845354072. The cubic root of 220005564 is about 603.6861628513.

Adding to 220005564 its reverse (465500022), we get a palindrome (685505586).

The spelling of 220005564 in words is "two hundred twenty million, five thousand, five hundred sixty-four".