205043045 has 12 divisors (see below), whose sum is σ = 257217996. Its totient is φ = 156900480.

The previous prime is 205043039. The next prime is 205043063. The reversal of 205043045 is 540340502.

205043045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 43270084 + 161772961 = 6578^2 + 12719^2 .

It is not a de Polignac number, because 205043045 - 2¹⁰ = 205042021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205043045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36116 + ... + 41405.

It is an arithmetic number, because the mean of its divisors is an integer number (21434833).

Almost surely, 2^205043045 is an apocalyptic number.

It is an amenable number.

205043045 is a deficient number, since it is larger than the sum of its proper divisors (52174951).

205043045 is an equidigital number, since it uses as much as digits as its factorization.

205043045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77572 (or 77549 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 205043045 is about 14319.3241809801. The cubic root of 205043045 is about 589.6781208948.

Adding to 205043045 its reverse (540340502), we get a palindrome (745383547).

The spelling of 205043045 in words is "two hundred five million, forty-three thousand, forty-five".