205047011 has 8 divisors (see below), whose sum is σ = 223302240. Its totient is φ = 187146432.

The previous prime is 205046987. The next prime is 205047019. The reversal of 205047011 is 110740502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205047011 - 2²⁶ = 137938147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205047019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87455 + ... + 89768.

It is an arithmetic number, because the mean of its divisors is an integer number (27912780).

Almost surely, 2^205047011 is an apocalyptic number.

205047011 is a deficient number, since it is larger than the sum of its proper divisors (18255229).

205047011 is a wasteful number, since it uses less digits than its factorization.

205047011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177325.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 205047011 is about 14319.4626644997. The cubic root of 205047011 is about 589.6819227767.

Adding to 205047011 its reverse (110740502), we get a palindrome (315787513).

The spelling of 205047011 in words is "two hundred five million, forty-seven thousand, eleven".