223322221 has 4 divisors (see below), whose sum is σ = 224117244. Its totient is φ = 222527200.

The previous prime is 223322191. The next prime is 223322279. The reversal of 223322221 is 122223322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 168636196 + 54686025 = 12986^2 + 7395^2 .

It is a cyclic number.

It is not a de Polignac number, because 223322221 - 2¹¹ = 223320173 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 (223322291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397090 + ... + 397651.

It is an arithmetic number, because the mean of its divisors is an integer number (56029311).

Almost surely, 2^223322221 is an apocalyptic number.

It is an amenable number.

223322221 is a deficient number, since it is larger than the sum of its proper divisors (795023).

223322221 is an equidigital number, since it uses as much as digits as its factorization.

223322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795022.

The product of its digits is 576, while the sum is 19.

The square root of 223322221 is about 14943.9693856753. The cubic root of 223322221 is about 606.7046349796.

Adding to 223322221 its reverse (122223322), we get a palindrome (345545543).

The spelling of 223322221 in words is "two hundred twenty-three million, three hundred twenty-two thousand, two hundred twenty-one".