205340530212 has 18 divisors (see below), whose sum is σ = 519055229238. Its totient is φ = 68446843392.

The previous prime is 205340530177. The next prime is 205340530237. The reversal of 205340530212 is 212035043502.

It is a happy number.

205340530212 is a `hidden beast` number, since 2 + 0 + 5 + 340 + 5 + 302 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134853466176 + 70487064036 = 367224^2 + 265494^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2851951773 + ... + 2851951844.

Almost surely, 2^205340530212 is an apocalyptic number.

It is an amenable number.

205340530212 is an abundant number, since it is smaller than the sum of its proper divisors (313714699026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205340530212 is a wasteful number, since it uses less digits than its factorization.

205340530212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703903627 (or 5703903622 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 205340530212 its reverse (212035043502), we get a palindrome (417375573714).

The spelling of 205340530212 in words is "two hundred five billion, three hundred forty million, five hundred thirty thousand, two hundred twelve".