205442213 has 2 divisors, whose sum is σ = 205442214. Its totient is φ = 205442212.

The previous prime is 205442201. The next prime is 205442287. The reversal of 205442213 is 312244502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167521249 + 37920964 = 12943^2 + 6158^2 .

It is a cyclic number.

It is not a de Polignac number, because 205442213 - 2¹⁰ = 205441189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205441213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102721106 + 102721107.

It is an arithmetic number, because the mean of its divisors is an integer number (102721107).

Almost surely, 2^205442213 is an apocalyptic number.

It is an amenable number.

205442213 is a deficient number, since it is larger than the sum of its proper divisors (1).

205442213 is an equidigital number, since it uses as much as digits as its factorization.

205442213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 205442213 is about 14333.2554920367. The cubic root of 205442213 is about 590.0605252473.

Adding to 205442213 its reverse (312244502), we get a palindrome (517686715).

The spelling of 205442213 in words is "two hundred five million, four hundred forty-two thousand, two hundred thirteen".