220555 has 4 divisors (see below), whose sum is σ = 264672. Its totient is φ = 176440.

The previous prime is 220553. The next prime is 220559. The reversal of 220555 is 555022.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 220555 - 2¹ = 220553 is a prime.

It is a Duffinian number.

220555 is a modest number, since divided by 555 gives 220 as remainder.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (220553) 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 3 ways as a sum of consecutive naturals, for example, 22051 + ... + 22060.

It is an arithmetic number, because the mean of its divisors is an integer number (66168).

2²²⁰⁵⁵⁵ is an apocalyptic number.

220555 is a deficient number, since it is larger than the sum of its proper divisors (44117).

220555 is an equidigital number, since it uses as much as digits as its factorization.

220555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44116.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 220555 is about 469.6328353086. The cubic root of 220555 is about 60.4188288300.

Adding to 220555 its reverse (555022), we get a palindrome (775577).

The spelling of 220555 in words is "two hundred twenty thousand, five hundred fifty-five".