205412211 has 12 divisors (see below), whose sum is σ = 312322920. Its totient is φ = 129733920.

The previous prime is 205412209. The next prime is 205412227. The reversal of 205412211 is 112214502.

It is not a de Polignac number, because 205412211 - 2¹ = 205412209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205412611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 600450 + ... + 600791.

It is an arithmetic number, because the mean of its divisors is an integer number (26026910).

Almost surely, 2^205412211 is an apocalyptic number.

205412211 is a deficient number, since it is larger than the sum of its proper divisors (106910709).

205412211 is a wasteful number, since it uses less digits than its factorization.

205412211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201266 (or 1201263 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 205412211 is about 14332.2088667449. The cubic root of 205412211 is about 590.0318004501.

Adding to 205412211 its reverse (112214502), we get a palindrome (317626713).

The spelling of 205412211 in words is "two hundred five million, four hundred twelve thousand, two hundred eleven".