223223221 has 8 divisors (see below), whose sum is σ = 241642520. Its totient is φ = 204982272.

The previous prime is 223223213. The next prime is 223223239. The reversal of 223223221 is 122322322.

It can be written as a sum of positive squares in 4 ways, for example, as 5336100 + 217887121 = 2310^2 + 14761^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 223223221 - 2³ = 223223213 is a prime.

It is a super-3 number, since 3×223223221³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223223921) 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, 41976 + ... + 46993.

It is an arithmetic number, because the mean of its divisors is an integer number (30205315).

Almost surely, 2^223223221 is an apocalyptic number.

It is an amenable number.

223223221 is a deficient number, since it is larger than the sum of its proper divisors (18419299).

223223221 is a wasteful number, since it uses less digits than its factorization.

223223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89175.

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

The square root of 223223221 is about 14940.6566455427. The cubic root of 223223221 is about 606.6149698666.

Adding to 223223221 its reverse (122322322), we get a palindrome (345545543).

The spelling of 223223221 in words is "two hundred twenty-three million, two hundred twenty-three thousand, two hundred twenty-one".