222217 has 4 divisors (see below), whose sum is σ = 223236. Its totient is φ = 221200.

The previous prime is 222199. The next prime is 222247. The reversal of 222217 is 712222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 95481 + 126736 = 309^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 222217 - 2¹¹ = 220169 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 222217.

It is not an unprimeable number, because it can be changed into a prime (222247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (55809).

2²²²²¹⁷ is an apocalyptic number.

It is an amenable number.

222217 is a deficient number, since it is larger than the sum of its proper divisors (1019).

222217 is an equidigital number, since it uses as much as digits as its factorization.

222217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018.

The product of its digits is 112, while the sum is 16.

The square root of 222217 is about 471.3989817554. The cubic root of 222217 is about 60.5702119536.

Adding to 222217 its reverse (712222), we get a palindrome (934439).

The spelling of 222217 in words is "two hundred twenty-two thousand, two hundred seventeen", and thus it is an iban number.