204211243 has 16 divisors (see below), whose sum is σ = 215815680. Its totient is φ = 192953376.

The previous prime is 204211211. The next prime is 204211247. The reversal of 204211243 is 342112402.

It is a cyclic number.

It is not a de Polignac number, because 204211243 - 2⁵ = 204211211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204211243.

It is not an unprimeable number, because it can be changed into a prime (204211247) 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, 440830 + ... + 441292.

It is an arithmetic number, because the mean of its divisors is an integer number (13488480).

Almost surely, 2^204211243 is an apocalyptic number.

204211243 is a deficient number, since it is larger than the sum of its proper divisors (11604437).

204211243 is a wasteful number, since it uses less digits than its factorization.

204211243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 204211243 is about 14290.2499278354. The cubic root of 204211243 is about 588.8796540711.

Adding to 204211243 its reverse (342112402), we get a palindrome (546323645).

The spelling of 204211243 in words is "two hundred four million, two hundred eleven thousand, two hundred forty-three".