223117221 has 8 divisors (see below), whose sum is σ = 297578880. Its totient is φ = 148700192.

The previous prime is 223117201. The next prime is 223117229. The reversal of 223117221 is 122711322.

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 223117221 - 2¹⁷ = 222986149 is a prime.

It is a super-3 number, since 3×223117221³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223117229) 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 7 ways as a sum of consecutive naturals, for example, 3121 + ... + 21353.

It is an arithmetic number, because the mean of its divisors is an integer number (37197360).

Almost surely, 2^223117221 is an apocalyptic number.

It is an amenable number.

223117221 is a deficient number, since it is larger than the sum of its proper divisors (74461659).

223117221 is a wasteful number, since it uses less digits than its factorization.

223117221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315.

The product of its digits is 336, while the sum is 21.

The square root of 223117221 is about 14937.1088568036. The cubic root of 223117221 is about 606.5189354020.

Adding to 223117221 its reverse (122711322), we get a palindrome (345828543).

The spelling of 223117221 in words is "two hundred twenty-three million, one hundred seventeen thousand, two hundred twenty-one".