204000281 has 2 divisors, whose sum is σ = 204000282. Its totient is φ = 204000280.

The previous prime is 204000241. The next prime is 204000301. The reversal of 204000281 is 182000402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102313225 + 101687056 = 10115^2 + 10084^2 .

It is a cyclic number.

It is not a de Polignac number, because 204000281 - 2⁶ = 204000217 is a prime.

It is a super-2 number, since 2×204000281² = 83232229296157922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (204000241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102000140 + 102000141.

It is an arithmetic number, because the mean of its divisors is an integer number (102000141).

Almost surely, 2^204000281 is an apocalyptic number.

It is an amenable number.

204000281 is a deficient number, since it is larger than the sum of its proper divisors (1).

204000281 is an equidigital number, since it uses as much as digits as its factorization.

204000281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 204000281 is about 14282.8666940499. The cubic root of 204000281 is about 588.6768019792.

Adding to 204000281 its reverse (182000402), we get a palindrome (386000683).

The spelling of 204000281 in words is "two hundred four million, two hundred eighty-one", and thus it is an aban number.