204243105133 has 2 divisors, whose sum is σ = 204243105134. Its totient is φ = 204243105132.

The previous prime is 204243105043. The next prime is 204243105193. The reversal of 204243105133 is 331501342402.

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., 167172223689 + 37070881444 = 408867^2 + 192538^2 .

It is a cyclic number.

It is not a de Polignac number, because 204243105133 - 2⁹ = 204243104621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204243105193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102121552566 + 102121552567.

It is an arithmetic number, because the mean of its divisors is an integer number (102121552567).

Almost surely, 2^204243105133 is an apocalyptic number.

It is an amenable number.

204243105133 is a deficient number, since it is larger than the sum of its proper divisors (1).

204243105133 is an equidigital number, since it uses as much as digits as its factorization.

204243105133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 204243105133 its reverse (331501342402), we get a palindrome (535744447535).

The spelling of 204243105133 in words is "two hundred four billion, two hundred forty-three million, one hundred five thousand, one hundred thirty-three".