2221222 has 4 divisors (see below), whose sum is σ = 3331836. Its totient is φ = 1110610.

The previous prime is 2221217. The next prime is 2221229.

2221222 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 (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555304 + ... + 555307.

It is an arithmetic number, because the mean of its divisors is an integer number (832959).

2^2221222 is an apocalyptic number.

2221222 is a deficient number, since it is larger than the sum of its proper divisors (1110614).

2221222 is a wasteful number, since it uses less digits than its factorization.

2221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110613.

The product of its digits is 64, while the sum is 13.

The square root of 2221222 is about 1490.3764625087. The cubic root of 2221222 is about 130.4760064127.

It can be divided in two parts, 222 and 1222, that added together give a square (1444 = 38²).

The spelling of 2221222 in words is "two million, two hundred twenty-one thousand, two hundred twenty-two".