2213223221 has 6 divisors (see below), whose sum is σ = 2432716566. Its totient is φ = 2012021000.

The previous prime is 2213223193. The next prime is 2213223239. The reversal of 2213223221 is 1223223122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2210316196 + 2907025 = 47014^2 + 1705^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2213223221 is a prime.

It is a super-2 number, since 2×2213223221² = 9796714051947229682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2213223193 and 2213223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213228221) 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 in 5 ways as a sum of consecutive naturals, for example, 9145430 + ... + 9145671.

It is an arithmetic number, because the mean of its divisors is an integer number (405452761).

Almost surely, 2^2213223221 is an apocalyptic number.

It is an amenable number.

2213223221 is a deficient number, since it is larger than the sum of its proper divisors (219493345).

2213223221 is a wasteful number, since it uses less digits than its factorization.

2213223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18291123 (or 18291112 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 2213223221 is about 47044.9064299208. The cubic root of 2213223221 is about 1303.1920023371.

Adding to 2213223221 its reverse (1223223122), we get a palindrome (3436446343).

Subtracting from 2213223221 its reverse (1223223122), we obtain a palindrome (990000099).

The spelling of 2213223221 in words is "two billion, two hundred thirteen million, two hundred twenty-three thousand, two hundred twenty-one".