2213221 has 8 divisors (see below), whose sum is σ = 2366784. Its totient is φ = 2064480.

The previous prime is 2213209. The next prime is 2213243. The reversal of 2213221 is 1223122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2213221 - 2⁷ = 2213093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213201) 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, 231 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (295848).

2^2213221 is an apocalyptic number.

It is an amenable number.

2213221 is a deficient number, since it is larger than the sum of its proper divisors (153563).

2213221 is a wasteful number, since it uses less digits than its factorization.

2213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411.

The product of its digits is 48, while the sum is 13.

The square root of 2213221 is about 1487.6898198213. The cubic root of 2213221 is about 130.3191566413.

Adding to 2213221 its reverse (1223122), we get a palindrome (3436343).

Subtracting from 2213221 its reverse (1223122), we obtain a palindrome (990099).

The spelling of 2213221 in words is "two million, two hundred thirteen thousand, two hundred twenty-one".