204216243 has 32 divisors (see below), whose sum is σ = 342876672. Its totient is φ = 105024000.

The previous prime is 204216239. The next prime is 204216247. The reversal of 204216243 is 342612402.

204216243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (204216239) and next prime (204216247).

It is not a de Polignac number, because 204216243 - 2² = 204216239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204216247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18955 + ... + 27707.

It is an arithmetic number, because the mean of its divisors is an integer number (10714896).

Almost surely, 2^204216243 is an apocalyptic number.

204216243 is a deficient number, since it is larger than the sum of its proper divisors (138660429).

204216243 is a wasteful number, since it uses less digits than its factorization.

204216243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 204216243 is about 14290.4248712206. The cubic root of 204216243 is about 588.8844601634.

Adding to 204216243 its reverse (342612402), we get a palindrome (546828645).

The spelling of 204216243 in words is "two hundred four million, two hundred sixteen thousand, two hundred forty-three".