223433421 has 4 divisors (see below), whose sum is σ = 297911232. Its totient is φ = 148955612.

The previous prime is 223433393. The next prime is 223433447. The reversal of 223433421 is 124334322.

223433421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 223433421 - 2¹³ = 223425229 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 223433391 and 223433400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223433321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37238901 + ... + 37238906.

It is an arithmetic number, because the mean of its divisors is an integer number (74477808).

Almost surely, 2^223433421 is an apocalyptic number.

It is an amenable number.

223433421 is a deficient number, since it is larger than the sum of its proper divisors (74477811).

223433421 is an equidigital number, since it uses as much as digits as its factorization.

223433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74477810.

The product of its digits is 3456, while the sum is 24.

The square root of 223433421 is about 14947.6894870077. The cubic root of 223433421 is about 606.8053181396.

Adding to 223433421 its reverse (124334322), we get a palindrome (347767743).

Subtracting from 223433421 its reverse (124334322), we obtain a palindrome (99099099).

The spelling of 223433421 in words is "two hundred twenty-three million, four hundred thirty-three thousand, four hundred twenty-one".