204424357 has 2 divisors, whose sum is σ = 204424358. Its totient is φ = 204424356.

The previous prime is 204424247. The next prime is 204424361. The reversal of 204424357 is 753424402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197290116 + 7134241 = 14046^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 204424357 - 2¹⁹ = 203900069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204424387) 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, 102212178 + 102212179.

It is an arithmetic number, because the mean of its divisors is an integer number (102212179).

Almost surely, 2^204424357 is an apocalyptic number.

It is an amenable number.

204424357 is a deficient number, since it is larger than the sum of its proper divisors (1).

204424357 is an equidigital number, since it uses as much as digits as its factorization.

204424357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 204424357 is about 14297.7046059848. The cubic root of 204424357 is about 589.0844336342.

Adding to 204424357 its reverse (753424402), we get a palindrome (957848759).

The spelling of 204424357 in words is "two hundred four million, four hundred twenty-four thousand, three hundred fifty-seven".