222655 has 4 divisors (see below), whose sum is σ = 267192. Its totient is φ = 178120.

The previous prime is 222647. The next prime is 222659. The reversal of 222655 is 556222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556222 = 2 ⋅278111.

It is not a de Polignac number, because 222655 - 2³ = 222647 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222659) by changing a digit.

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, 22261 + ... + 22270.

It is an arithmetic number, because the mean of its divisors is an integer number (66798).

2²²²⁶⁵⁵ is an apocalyptic number.

222655 is a deficient number, since it is larger than the sum of its proper divisors (44537).

222655 is an equidigital number, since it uses as much as digits as its factorization.

222655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44536.

The product of its digits is 1200, while the sum is 22.

The square root of 222655 is about 471.8633276702. The cubic root of 222655 is about 60.6099814004.

Adding to 222655 its reverse (556222), we get a palindrome (778877).

The spelling of 222655 in words is "two hundred twenty-two thousand, six hundred fifty-five".