222181222 has 4 divisors (see below), whose sum is σ = 333271836. Its totient is φ = 111090610.

The previous prime is 222181217. The next prime is 222181229.

222181222 is nontrivially palindromic in base 10.

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

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 junction number, because it is equal to n+sod(n) for n = 222181193 and 222181202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222181229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55545304 + ... + 55545307.

It is an arithmetic number, because the mean of its divisors is an integer number (83317959).

Almost surely, 2^222181222 is an apocalyptic number.

222181222 is a deficient number, since it is larger than the sum of its proper divisors (111090614).

222181222 is a wasteful number, since it uses less digits than its factorization.

222181222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111090613.

The product of its digits is 512, while the sum is 22.

The square root of 222181222 is about 14905.7445973021. The cubic root of 222181222 is about 605.6696108121.

The spelling of 222181222 in words is "two hundred twenty-two million, one hundred eighty-one thousand, two hundred twenty-two".