223311221 has 4 divisors (see below), whose sum is σ = 255212832. Its totient is φ = 191409612.

The previous prime is 223311211. The next prime is 223311287. The reversal of 223311221 is 122113322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 223311221 - 2¹⁸ = 223049077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223311211) 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, 15950795 + ... + 15950808.

It is an arithmetic number, because the mean of its divisors is an integer number (63803208).

Almost surely, 2^223311221 is an apocalyptic number.

It is an amenable number.

223311221 is a deficient number, since it is larger than the sum of its proper divisors (31901611).

223311221 is an equidigital number, since it uses as much as digits as its factorization.

223311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31901610.

The product of its digits is 144, while the sum is 17.

The square root of 223311221 is about 14943.6013397039. The cubic root of 223311221 is about 606.6946734981.

Adding to 223311221 its reverse (122113322), we get a palindrome (345424543).

The spelling of 223311221 in words is "two hundred twenty-three million, three hundred eleven thousand, two hundred twenty-one".