204203281 has 2 divisors, whose sum is σ = 204203282. Its totient is φ = 204203280.

The previous prime is 204203267. The next prime is 204203287. The reversal of 204203281 is 182302402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 54997056 = 12215^2 + 7416^2 .

It is a cyclic number.

It is not a de Polignac number, because 204203281 - 2¹¹ = 204201233 is a prime.

It is a super-2 number, since 2×204203281² = 83397959942329922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204203287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102101640 + 102101641.

It is an arithmetic number, because the mean of its divisors is an integer number (102101641).

Almost surely, 2^204203281 is an apocalyptic number.

It is an amenable number.

204203281 is a deficient number, since it is larger than the sum of its proper divisors (1).

204203281 is an equidigital number, since it uses as much as digits as its factorization.

204203281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 204203281 is about 14289.9713435682. The cubic root of 204203281 is about 588.8720006878.

Adding to 204203281 its reverse (182302402), we get a palindrome (386505683).

The spelling of 204203281 in words is "two hundred four million, two hundred three thousand, two hundred eighty-one".