220564 has 12 divisors (see below), whose sum is σ = 392224. Its totient is φ = 108504.

The previous prime is 220559. The next prime is 220573. The reversal of 220564 is 465022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144 + ... + 679.

2²²⁰⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

220564 is a deficient number, since it is larger than the sum of its proper divisors (171660).

220564 is a wasteful number, since it uses less digits than its factorization.

220564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 220564 is about 469.6424171644. The cubic root of 220564 is about 60.4196506387.

Adding to 220564 its reverse (465022), we get a palindrome (685586).

It can be divided in two parts, 220 and 564, that added together give a square (784 = 28²).

The spelling of 220564 in words is "two hundred twenty thousand, five hundred sixty-four".