223424021 has 8 divisors (see below), whose sum is σ = 235766400. Its totient is φ = 211140000.

The previous prime is 223424011. The next prime is 223424027. The reversal of 223424021 is 120424322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223424021 - 2¹⁸ = 223161877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223423984 and 223424002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223424027) 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 7 ways as a sum of consecutive naturals, for example, 6605 + ... + 22146.

It is an arithmetic number, because the mean of its divisors is an integer number (29470800).

Almost surely, 2^223424021 is an apocalyptic number.

It is an amenable number.

223424021 is a deficient number, since it is larger than the sum of its proper divisors (12342379).

223424021 is a wasteful number, since it uses less digits than its factorization.

223424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29179.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 223424021 is about 14947.3750538347. The cubic root of 223424021 is about 606.7968084458.

Adding to 223424021 its reverse (120424322), we get a palindrome (343848343).

The spelling of 223424021 in words is "two hundred twenty-three million, four hundred twenty-four thousand, twenty-one".