204112213 has 4 divisors (see below), whose sum is σ = 206133228. Its totient is φ = 202091200.

The previous prime is 204112177. The next prime is 204112219. The reversal of 204112213 is 312211402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151954929 + 52157284 = 12327^2 + 7222^2 .

It is a cyclic number.

It is not a de Polignac number, because 204112213 - 2²¹ = 202015061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204112219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010356 + ... + 1010557.

It is an arithmetic number, because the mean of its divisors is an integer number (51533307).

Almost surely, 2^204112213 is an apocalyptic number.

It is an amenable number.

204112213 is a deficient number, since it is larger than the sum of its proper divisors (2021015).

204112213 is a wasteful number, since it uses less digits than its factorization.

204112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021014.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 204112213 is about 14286.7845577653. The cubic root of 204112213 is about 588.7844484391.

Adding to 204112213 its reverse (312211402), we get a palindrome (516323615).

The spelling of 204112213 in words is "two hundred four million, one hundred twelve thousand, two hundred thirteen".