223404321 has 32 divisors (see below), whose sum is σ = 352608256. Its totient is φ = 123120000.

The previous prime is 223404319. The next prime is 223404341. The reversal of 223404321 is 123404322.

It is not a de Polignac number, because 223404321 - 2¹ = 223404319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (223404341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371421 + ... + 372021.

It is an arithmetic number, because the mean of its divisors is an integer number (11019008).

Almost surely, 2^223404321 is an apocalyptic number.

223404321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

223404321 is a deficient number, since it is larger than the sum of its proper divisors (129203935).

223404321 is a wasteful number, since it uses less digits than its factorization.

223404321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

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

The square root of 223404321 is about 14946.7160607272. The cubic root of 223404321 is about 606.7789735260.

Adding to 223404321 its reverse (123404322), we get a palindrome (346808643).

Subtracting from 223404321 its reverse (123404322), we obtain a palindrome (99999999).

The spelling of 223404321 in words is "two hundred twenty-three million, four hundred four thousand, three hundred twenty-one".