204512213 has 4 divisors (see below), whose sum is σ = 208370988. Its totient is φ = 200653440.

The previous prime is 204512183. The next prime is 204512221. The reversal of 204512213 is 312215402.

204512213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312215402 = 2 ⋅156107701.

It can be written as a sum of positive squares in 2 ways, for example, as 83137924 + 121374289 = 9118^2 + 11017^2 .

It is a cyclic number.

It is not a de Polignac number, because 204512213 - 2⁶ = 204512149 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 (204512293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929308 + ... + 1929413.

It is an arithmetic number, because the mean of its divisors is an integer number (52092747).

Almost surely, 2^204512213 is an apocalyptic number.

It is an amenable number.

204512213 is a deficient number, since it is larger than the sum of its proper divisors (3858775).

204512213 is an equidigital number, since it uses as much as digits as its factorization.

204512213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858774.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 204512213 is about 14300.7766572309. The cubic root of 204512213 is about 589.1688123424.

Adding to 204512213 its reverse (312215402), we get a palindrome (516727615).

The spelling of 204512213 in words is "two hundred four million, five hundred twelve thousand, two hundred thirteen".