204115213 has 2 divisors, whose sum is σ = 204115214. Its totient is φ = 204115212.

The previous prime is 204115207. The next prime is 204115231. The reversal of 204115213 is 312511402.

Together with next prime (204115231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189392644 + 14722569 = 13762^2 + 3837^2 .

It is a cyclic number.

It is not a de Polignac number, because 204115213 - 2¹³ = 204107021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204115013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102057606 + 102057607.

It is an arithmetic number, because the mean of its divisors is an integer number (102057607).

Almost surely, 2^204115213 is an apocalyptic number.

It is an amenable number.

204115213 is a deficient number, since it is larger than the sum of its proper divisors (1).

204115213 is an equidigital number, since it uses as much as digits as its factorization.

204115213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 204115213 is about 14286.8895495136. The cubic root of 204115213 is about 588.7873330365.

Adding to 204115213 its reverse (312511402), we get a palindrome (516626615).

The spelling of 204115213 in words is "two hundred four million, one hundred fifteen thousand, two hundred thirteen".