204400311 has 4 divisors (see below), whose sum is σ = 272533752. Its totient is φ = 136266872.

The previous prime is 204400303. The next prime is 204400319. The reversal of 204400311 is 113004402.

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

It is an interprime number because it is at equal distance from previous prime (204400303) and next prime (204400319).

It is a cyclic number.

It is not a de Polignac number, because 204400311 - 2³ = 204400303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204400319) 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, 34066716 + ... + 34066721.

It is an arithmetic number, because the mean of its divisors is an integer number (68133438).

Almost surely, 2^204400311 is an apocalyptic number.

204400311 is a deficient number, since it is larger than the sum of its proper divisors (68133441).

204400311 is an equidigital number, since it uses as much as digits as its factorization.

204400311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68133440.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 204400311 is about 14296.8636770447. The cubic root of 204400311 is about 589.0613351477.

Adding to 204400311 its reverse (113004402), we get a palindrome (317404713).

The spelling of 204400311 in words is "two hundred four million, four hundred thousand, three hundred eleven".