243113205 has 16 divisors (see below), whose sum is σ = 390392064. Its totient is φ = 129190080.

The previous prime is 243113203. The next prime is 243113219. The reversal of 243113205 is 502311342.

It is not a de Polignac number, because 243113205 - 2¹ = 243113203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243113203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25101 + ... + 33410.

It is an arithmetic number, because the mean of its divisors is an integer number (24399504).

Almost surely, 2^243113205 is an apocalyptic number.

It is an amenable number.

243113205 is a deficient number, since it is larger than the sum of its proper divisors (147278859).

243113205 is a wasteful number, since it uses less digits than its factorization.

243113205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58796.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 243113205 is about 15592.0878973921. The cubic root of 243113205 is about 624.1220355296.

Adding to 243113205 its reverse (502311342), we get a palindrome (745424547).

The spelling of 243113205 in words is "two hundred forty-three million, one hundred thirteen thousand, two hundred five".