205340210 has 16 divisors (see below), whose sum is σ = 372885336. Its totient is φ = 81408768.

The previous prime is 205340189. The next prime is 205340221. The reversal of 205340210 is 12043502.

It can be written as a sum of positive squares in 4 ways, for example, as 56085121 + 149255089 = 7489^2 + 12217^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89729 + ... + 91988.

Almost surely, 2^205340210 is an apocalyptic number.

205340210 is a deficient number, since it is larger than the sum of its proper divisors (167545126).

205340210 is a wasteful number, since it uses less digits than its factorization.

205340210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181837.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 205340210 is about 14329.6967867433. The cubic root of 205340210 is about 589.9628531625.

Adding to 205340210 its reverse (12043502), we get a palindrome (217383712).

The spelling of 205340210 in words is "two hundred five million, three hundred forty thousand, two hundred ten".