204421343 has 4 divisors (see below), whose sum is σ = 233624400. Its totient is φ = 175218288.

The previous prime is 204421339. The next prime is 204421351. The reversal of 204421343 is 343124402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204421343 - 2² = 204421339 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 (204421303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14601518 + ... + 14601531.

It is an arithmetic number, because the mean of its divisors is an integer number (58406100).

Almost surely, 2^204421343 is an apocalyptic number.

204421343 is a deficient number, since it is larger than the sum of its proper divisors (29203057).

204421343 is an equidigital number, since it uses as much as digits as its factorization.

204421343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29203056.

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

The square root of 204421343 is about 14297.5992040622. The cubic root of 204421343 is about 589.0815384977.

Adding to 204421343 its reverse (343124402), we get a palindrome (547545745).

The spelling of 204421343 in words is "two hundred four million, four hundred twenty-one thousand, three hundred forty-three".