223431321 has 4 divisors (see below), whose sum is σ = 297908432. Its totient is φ = 148954212.

The previous prime is 223431281. The next prime is 223431343. The reversal of 223431321 is 123134322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 223431321 - 2¹⁴ = 223414937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223431521) 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 3 ways as a sum of consecutive naturals, for example, 37238551 + ... + 37238556.

It is an arithmetic number, because the mean of its divisors is an integer number (74477108).

Almost surely, 2^223431321 is an apocalyptic number.

It is an amenable number.

223431321 is a deficient number, since it is larger than the sum of its proper divisors (74477111).

223431321 is an equidigital number, since it uses as much as digits as its factorization.

223431321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74477110.

The product of its digits is 864, while the sum is 21.

The square root of 223431321 is about 14947.6192418726. The cubic root of 223431321 is about 606.8034170585.

Adding to 223431321 its reverse (123134322), we get a palindrome (346565643).

It can be divided in two parts, 22 and 3431321, that added together give a palindrome (3431343).

The spelling of 223431321 in words is "two hundred twenty-three million, four hundred thirty-one thousand, three hundred twenty-one".