204381313 has 2 divisors, whose sum is σ = 204381314. Its totient is φ = 204381312.

The previous prime is 204381311. The next prime is 204381323. The reversal of 204381313 is 313183402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193961329 + 10419984 = 13927^2 + 3228^2 .

It is a cyclic number.

It is not a de Polignac number, because 204381313 - 2¹ = 204381311 is a prime.

It is a super-2 number, since 2×204381313² = 83543442207207938, which contains 22 as substring.

Together with 204381311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204381311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102190656 + 102190657.

It is an arithmetic number, because the mean of its divisors is an integer number (102190657).

Almost surely, 2^204381313 is an apocalyptic number.

It is an amenable number.

204381313 is a deficient number, since it is larger than the sum of its proper divisors (1).

204381313 is an equidigital number, since it uses as much as digits as its factorization.

204381313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 204381313 is about 14296.1992501504. The cubic root of 204381313 is about 589.0430844677.

The spelling of 204381313 in words is "two hundred four million, three hundred eighty-one thousand, three hundred thirteen".