204322405 has 24 divisors (see below), whose sum is σ = 302001048. Its totient is φ = 131862528.

The previous prime is 204322381. The next prime is 204322423. The reversal of 204322405 is 504223402.

It can be written as a sum of positive squares in 4 ways, for example, as 72692676 + 131629729 = 8526^2 + 11473^2 .

It is not a de Polignac number, because 204322405 - 2⁷ = 204322277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20364 + ... + 28693.

It is an arithmetic number, because the mean of its divisors is an integer number (12583377).

Almost surely, 2^204322405 is an apocalyptic number.

It is an amenable number.

204322405 is a deficient number, since it is larger than the sum of its proper divisors (97678643).

204322405 is a wasteful number, since it uses less digits than its factorization.

204322405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49093 (or 49086 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 204322405 is about 14294.1388338018. The cubic root of 204322405 is about 588.9864865270.

Adding to 204322405 its reverse (504223402), we get a palindrome (708545807).

The spelling of 204322405 in words is "two hundred four million, three hundred twenty-two thousand, four hundred five".