223432421 has 4 divisors (see below), whose sum is σ = 225138144. Its totient is φ = 221726700.

The previous prime is 223432403. The next prime is 223432423. The reversal of 223432421 is 124234322.

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 223432421 - 2⁶ = 223432357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223432423) 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, 852665 + ... + 852926.

It is an arithmetic number, because the mean of its divisors is an integer number (56284536).

Almost surely, 2^223432421 is an apocalyptic number.

It is an amenable number.

223432421 is a deficient number, since it is larger than the sum of its proper divisors (1705723).

223432421 is a wasteful number, since it uses less digits than its factorization.

223432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705722.

The product of its digits is 2304, while the sum is 23.

The square root of 223432421 is about 14947.6560369845. The cubic root of 223432421 is about 606.8044128643.

Adding to 223432421 its reverse (124234322), we get a palindrome (347666743).

The spelling of 223432421 in words is "two hundred twenty-three million, four hundred thirty-two thousand, four hundred twenty-one".