223320321 has 20 divisors (see below), whose sum is σ = 381260352. Its totient is φ = 127611288.

The previous prime is 223320289. The next prime is 223320353. The reversal of 223320321 is 123023322.

It is a happy number.

223320321 is a `hidden beast` number, since 2 + 23 + 320 + 321 = 666.

It is an interprime number because it is at equal distance from previous prime (223320289) and next prime (223320353).

It is not a de Polignac number, because 223320321 - 2⁵ = 223320289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223320294 and 223320303.

It is not an unprimeable number, because it can be changed into a prime (223320121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 196365 + ... + 197498.

Almost surely, 2^223320321 is an apocalyptic number.

223320321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

223320321 is a deficient number, since it is larger than the sum of its proper divisors (157940031).

223320321 is an equidigital number, since it uses as much as digits as its factorization.

223320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393882 (or 393873 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 223320321 is about 14943.9058147460. The cubic root of 223320321 is about 606.7029143835.

Adding to 223320321 its reverse (123023322), we get a palindrome (346343643).

The spelling of 223320321 in words is "two hundred twenty-three million, three hundred twenty thousand, three hundred twenty-one".