204542573 has 2 divisors, whose sum is σ = 204542574. Its totient is φ = 204542572.

The previous prime is 204542431. The next prime is 204542579. The reversal of 204542573 is 375245402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110103049 + 94439524 = 10493^2 + 9718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204542573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204542579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102271286 + 102271287.

It is an arithmetic number, because the mean of its divisors is an integer number (102271287).

Almost surely, 2^204542573 is an apocalyptic number.

It is an amenable number.

204542573 is a deficient number, since it is larger than the sum of its proper divisors (1).

204542573 is an equidigital number, since it uses as much as digits as its factorization.

204542573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 204542573 is about 14301.8380986501. The cubic root of 204542573 is about 589.1979650921.

Adding to 204542573 its reverse (375245402), we get a palindrome (579787975).

The spelling of 204542573 in words is "two hundred four million, five hundred forty-two thousand, five hundred seventy-three".