204430291 has 16 divisors (see below), whose sum is σ = 238016800. Its totient is φ = 173933568.

The previous prime is 204430273. The next prime is 204430349. The reversal of 204430291 is 192034402.

It is a cyclic number.

It is not a de Polignac number, because 204430291 - 2¹⁷ = 204299219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204430231) 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 15 ways as a sum of consecutive naturals, for example, 2046 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (14876050).

Almost surely, 2^204430291 is an apocalyptic number.

204430291 is a deficient number, since it is larger than the sum of its proper divisors (33586509).

204430291 is a wasteful number, since it uses less digits than its factorization.

204430291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22438.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 204430291 is about 14297.9121203062. The cubic root of 204430291 is about 589.0901335309.

Adding to 204430291 its reverse (192034402), we get a palindrome (396464693).

The spelling of 204430291 in words is "two hundred four million, four hundred thirty thousand, two hundred ninety-one".