204642271 has 2 divisors, whose sum is σ = 204642272. Its totient is φ = 204642270.

The previous prime is 204642233. The next prime is 204642281. The reversal of 204642271 is 172246402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204642271 - 2¹⁷ = 204511199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204642211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102321135 + 102321136.

It is an arithmetic number, because the mean of its divisors is an integer number (102321136).

Almost surely, 2^204642271 is an apocalyptic number.

204642271 is a deficient number, since it is larger than the sum of its proper divisors (1).

204642271 is an equidigital number, since it uses as much as digits as its factorization.

204642271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 204642271 is about 14305.3231700651. The cubic root of 204642271 is about 589.2936783651.

Adding to 204642271 its reverse (172246402), we get a palindrome (376888673).

The spelling of 204642271 in words is "two hundred four million, six hundred forty-two thousand, two hundred seventy-one".