222291 has 8 divisors (see below), whose sum is σ = 329360. Its totient is φ = 148176.

The previous prime is 222289. The next prime is 222293. The reversal of 222291 is 192222.

222291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (222289) and next prime (222293).

It is not a de Polignac number, because 222291 - 2¹ = 222289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4090 + ... + 4143.

It is an arithmetic number, because the mean of its divisors is an integer number (41170).

2²²²²⁹¹ is an apocalyptic number.

222291 is a deficient number, since it is larger than the sum of its proper divisors (107069).

222291 is an equidigital number, since it uses as much as digits as its factorization.

222291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242 (or 8236 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 222291 is about 471.4774649970. The cubic root of 222291 is about 60.5769346590.

It can be divided in two parts, 2222 and 91, that multiplied together give a palindrome (202202).

The spelling of 222291 in words is "two hundred twenty-two thousand, two hundred ninety-one".