204321001 has 4 divisors (see below), whose sum is σ = 205048404. Its totient is φ = 203593600.

The previous prime is 204320971. The next prime is 204321043. The reversal of 204321001 is 100123402.

204321001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63186601 + 141134400 = 7949^2 + 11880^2 .

It is a cyclic number.

It is not a de Polignac number, because 204321001 - 2⁷ = 204320873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204301001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363280 + ... + 363841.

It is an arithmetic number, because the mean of its divisors is an integer number (51262101).

Almost surely, 2^204321001 is an apocalyptic number.

It is an amenable number.

204321001 is a deficient number, since it is larger than the sum of its proper divisors (727403).

204321001 is an equidigital number, since it uses as much as digits as its factorization.

204321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727402.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 204321001 is about 14294.0897226791. The cubic root of 204321001 is about 588.9851374517.

Adding to 204321001 its reverse (100123402), we get a palindrome (304444403).

The spelling of 204321001 in words is "two hundred four million, three hundred twenty-one thousand, one".