205243203 has 16 divisors (see below), whose sum is σ = 299604096. Its totient is φ = 123944640.

The previous prime is 205243169. The next prime is 205243273. The reversal of 205243203 is 302342502.

205243203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205243203 - 2¹² = 205239107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205243203.

It is not an unprimeable number, because it can be changed into a prime (205243273) 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, 1650 + ... + 20327.

It is an arithmetic number, because the mean of its divisors is an integer number (18725256).

Almost surely, 2^205243203 is an apocalyptic number.

205243203 is a deficient number, since it is larger than the sum of its proper divisors (94360893).

205243203 is a wasteful number, since it uses less digits than its factorization.

205243203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22274.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 205243203 is about 14326.3115629949. The cubic root of 205243203 is about 589.8699349414.

Adding to 205243203 its reverse (302342502), we get a palindrome (507585705).

The spelling of 205243203 in words is "two hundred five million, two hundred forty-three thousand, two hundred three".