204513313 has 2 divisors, whose sum is σ = 204513314. Its totient is φ = 204513312.

The previous prime is 204513311. The next prime is 204513347. The reversal of 204513313 is 313315402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117874449 + 86638864 = 10857^2 + 9308^2 .

It is a cyclic number.

It is not a de Polignac number, because 204513313 - 2¹ = 204513311 is a prime.

Together with 204513311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204513311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102256656 + 102256657.

It is an arithmetic number, because the mean of its divisors is an integer number (102256657).

Almost surely, 2^204513313 is an apocalyptic number.

It is an amenable number.

204513313 is a deficient number, since it is larger than the sum of its proper divisors (1).

204513313 is an equidigital number, since it uses as much as digits as its factorization.

204513313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 204513313 is about 14300.8151166288. The cubic root of 204513313 is about 589.1698686518.

Adding to 204513313 its reverse (313315402), we get a palindrome (517828715).

The spelling of 204513313 in words is "two hundred four million, five hundred thirteen thousand, three hundred thirteen".