223401221 has 8 divisors (see below), whose sum is σ = 242745600. Its totient is φ = 204815520.

The previous prime is 223401173. The next prime is 223401229. The reversal of 223401221 is 122104322.

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 223401221 - 2¹⁰ = 223400197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 223401221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223401229) 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, 189056 + ... + 190233.

It is an arithmetic number, because the mean of its divisors is an integer number (30343200).

Almost surely, 2^223401221 is an apocalyptic number.

It is an amenable number.

223401221 is a deficient number, since it is larger than the sum of its proper divisors (19344379).

223401221 is a wasteful number, since it uses less digits than its factorization.

223401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379339.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 223401221 is about 14946.6123586584. The cubic root of 223401221 is about 606.7761669203.

Adding to 223401221 its reverse (122104322), we get a palindrome (345505543).

The spelling of 223401221 in words is "two hundred twenty-three million, four hundred one thousand, two hundred twenty-one".