204313321 has 2 divisors, whose sum is σ = 204313322. Its totient is φ = 204313320.

The previous prime is 204313313. The next prime is 204313367. The reversal of 204313321 is 123313402.

204313321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183738025 + 20575296 = 13555^2 + 4536^2 .

It is a cyclic number.

It is not a de Polignac number, because 204313321 - 2³ = 204313313 is a prime.

It is not a weakly prime, because it can be changed into another prime (204319321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102156660 + 102156661.

It is an arithmetic number, because the mean of its divisors is an integer number (102156661).

Almost surely, 2^204313321 is an apocalyptic number.

It is an amenable number.

204313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

204313321 is an equidigital number, since it uses as much as digits as its factorization.

204313321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 204313321 is about 14293.8210776545. The cubic root of 204313321 is about 588.9777577852.

Adding to 204313321 its reverse (123313402), we get a palindrome (327626723).

The spelling of 204313321 in words is "two hundred four million, three hundred thirteen thousand, three hundred twenty-one".