205230133 has 4 divisors (see below), whose sum is σ = 210235788. Its totient is φ = 200224480.

The previous prime is 205230121. The next prime is 205230211. The reversal of 205230133 is 331032502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121727089 + 83503044 = 11033^2 + 9138^2 .

It is a cyclic number.

It is not a de Polignac number, because 205230133 - 2⁵ = 205230101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205230133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205236133) 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 in 3 ways as a sum of consecutive naturals, for example, 2502766 + ... + 2502847.

It is an arithmetic number, because the mean of its divisors is an integer number (52558947).

Almost surely, 2^205230133 is an apocalyptic number.

It is an amenable number.

205230133 is a deficient number, since it is larger than the sum of its proper divisors (5005655).

205230133 is an equidigital number, since it uses as much as digits as its factorization.

205230133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005654.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 205230133 is about 14325.8554020345. The cubic root of 205230133 is about 589.8574135950.

Adding to 205230133 its reverse (331032502), we get a palindrome (536262635).

The spelling of 205230133 in words is "two hundred five million, two hundred thirty thousand, one hundred thirty-three".