223313221 has 4 divisors (see below), whose sum is σ = 227526732. Its totient is φ = 219099712.

The previous prime is 223313219. The next prime is 223313227. The reversal of 223313221 is 122313322.

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 169364196 + 53949025 = 13014^2 + 7345^2 .

It is a cyclic number.

It is not a de Polignac number, because 223313221 - 2¹ = 223313219 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 (223313227) 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 3 ways as a sum of consecutive naturals, for example, 2106676 + ... + 2106781.

It is an arithmetic number, because the mean of its divisors is an integer number (56881683).

Almost surely, 2^223313221 is an apocalyptic number.

It is an amenable number.

223313221 is a deficient number, since it is larger than the sum of its proper divisors (4213511).

223313221 is an equidigital number, since it uses as much as digits as its factorization.

223313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213510.

The product of its digits is 432, while the sum is 19.

The square root of 223313221 is about 14943.6682578275. The cubic root of 223313221 is about 606.6964847009.

Adding to 223313221 its reverse (122313322), we get a palindrome (345626543).

It can be divided in two parts, 22331 and 3221, that added together give a palindrome (25552).

The spelling of 223313221 in words is "two hundred twenty-three million, three hundred thirteen thousand, two hundred twenty-one".