204424321 has 8 divisors (see below), whose sum is σ = 209484000. Its totient is φ = 199417920.

The previous prime is 204424247. The next prime is 204424357. The reversal of 204424321 is 123424402.

It is a happy number.

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 204424321 - 2¹⁵ = 204391553 is a prime.

It is a super-2 number, since 2×204424321² = 83578606032622082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204424292 and 204424301.

It is not an unprimeable number, because it can be changed into a prime (204424361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5496 + ... + 20953.

It is an arithmetic number, because the mean of its divisors is an integer number (26185500).

Almost surely, 2^204424321 is an apocalyptic number.

It is an amenable number.

204424321 is a deficient number, since it is larger than the sum of its proper divisors (5059679).

204424321 is a wasteful number, since it uses less digits than its factorization.

204424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26639.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 204424321 is about 14297.7033470414. The cubic root of 204424321 is about 589.0843990541.

Adding to 204424321 its reverse (123424402), we get a palindrome (327848723).

The spelling of 204424321 in words is "two hundred four million, four hundred twenty-four thousand, three hundred twenty-one".