220563 has 20 divisors (see below), whose sum is σ = 377520. Its totient is φ = 125712.

The previous prime is 220559. The next prime is 220573. The reversal of 220563 is 365022.

It is not a de Polignac number, because 220563 - 2² = 220559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220513) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 373 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (18876).

2²²⁰⁵⁶³ is an apocalyptic number.

220563 is a deficient number, since it is larger than the sum of its proper divisors (156957).

220563 is an equidigital number, since it uses as much as digits as its factorization.

220563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 220563 is about 469.6413525234. The cubic root of 220563 is about 60.4195593277.

Adding to 220563 its reverse (365022), we get a palindrome (585585).

The spelling of 220563 in words is "two hundred twenty thousand, five hundred sixty-three".