205305255 has 24 divisors (see below), whose sum is σ = 356524272. Its totient is φ = 109292544.

The previous prime is 205305229. The next prime is 205305257. The reversal of 205305255 is 552503502.

It is a de Polignac number, because none of the positive numbers 2^k-205305255 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205305257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22012 + ... + 29918.

It is an arithmetic number, because the mean of its divisors is an integer number (14855178).

Almost surely, 2^205305255 is an apocalyptic number.

205305255 is a deficient number, since it is larger than the sum of its proper divisors (151219017).

205305255 is a wasteful number, since it uses less digits than its factorization.

205305255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8495 (or 8492 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 205305255 is about 14328.4770649221. The cubic root of 205305255 is about 589.9293748652.

Adding to 205305255 its reverse (552503502), we get a palindrome (757808757).

The spelling of 205305255 in words is "two hundred five million, three hundred five thousand, two hundred fifty-five".