223440321 has 8 divisors (see below), whose sum is σ = 320837440. Its totient is φ = 137501712.

The previous prime is 223440319. The next prime is 223440379. The reversal of 223440321 is 123044322.

223440321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 223440321 - 2¹ = 223440319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223440121) 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, 2864581 + ... + 2864658.

It is an arithmetic number, because the mean of its divisors is an integer number (40104680).

Almost surely, 2^223440321 is an apocalyptic number.

It is an amenable number.

223440321 is a deficient number, since it is larger than the sum of its proper divisors (97397119).

223440321 is a wasteful number, since it uses less digits than its factorization.

223440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729255.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 223440321 is about 14947.9202901273. The cubic root of 223440321 is about 606.8115644650.

Adding to 223440321 its reverse (123044322), we get a palindrome (346484643).

The spelling of 223440321 in words is "two hundred twenty-three million, four hundred forty thousand, three hundred twenty-one".