204320291 has 8 divisors (see below), whose sum is σ = 234054144. Its totient is φ = 174722760.

The previous prime is 204320279. The next prime is 204320317. The reversal of 204320291 is 192023402.

204320291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 204320291 - 2⁶ = 204320227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204320251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30845 + ... + 36878.

It is an arithmetic number, because the mean of its divisors is an integer number (29256768).

Almost surely, 2^204320291 is an apocalyptic number.

204320291 is a deficient number, since it is larger than the sum of its proper divisors (29733853).

204320291 is an equidigital number, since it uses as much as digits as its factorization.

204320291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68161.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 204320291 is about 14294.0648872181. The cubic root of 204320291 is about 588.9844552247.

Adding to 204320291 its reverse (192023402), we get a palindrome (396343693).

The spelling of 204320291 in words is "two hundred four million, three hundred twenty thousand, two hundred ninety-one".