2223221 has 16 divisors (see below), whose sum is σ = 2986368. Its totient is φ = 1598400.

The previous prime is 2223217. The next prime is 2223233. The reversal of 2223221 is 1223222.

It is a cyclic number.

It is not a de Polignac number, because 2223221 - 2² = 2223217 is a prime.

It is a super-2 number, since 2×2223221² = 9885423229682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2223196 and 2223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (186648).

2^2223221 is an apocalyptic number.

It is an amenable number.

2223221 is a deficient number, since it is larger than the sum of its proper divisors (763147).

2223221 is a wasteful number, since it uses less digits than its factorization.

2223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252.

The product of its digits is 96, while the sum is 14.

The square root of 2223221 is about 1491.0469476177. The cubic root of 2223221 is about 130.5151355247.

Adding to 2223221 its reverse (1223222), we get a palindrome (3446443).

Subtracting from 2223221 its reverse (1223222), we obtain a palindrome (999999).

It can be divided in two parts, 222 and 3221, that added together give a palindrome (3443).

The spelling of 2223221 in words is "two million, two hundred twenty-three thousand, two hundred twenty-one".