205243443133 has 16 divisors (see below), whose sum is σ = 207422495280. Its totient is φ = 203078002176.

The previous prime is 205243443109. The next prime is 205243443151. The reversal of 205243443133 is 331344342502.

It can be written as a sum of positive squares in 8 ways, for example, as 978313284 + 204265129849 = 31278^2 + 451957^2 .

It is a cyclic number.

It is not a de Polignac number, because 205243443133 - 2²⁵ = 205209888701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205243443173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50389185 + ... + 50393257.

It is an arithmetic number, because the mean of its divisors is an integer number (12963905955).

Almost surely, 2^205243443133 is an apocalyptic number.

It is an amenable number.

205243443133 is a deficient number, since it is larger than the sum of its proper divisors (2179052147).

205243443133 is a wasteful number, since it uses less digits than its factorization.

205243443133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616.

The product of its (nonzero) digits is 103680, while the sum is 34.

Adding to 205243443133 its reverse (331344342502), we get a palindrome (536587785635).

The spelling of 205243443133 in words is "two hundred five billion, two hundred forty-three million, four hundred forty-three thousand, one hundred thirty-three".