205085011 has 2 divisors, whose sum is σ = 205085012. Its totient is φ = 205085010.

The previous prime is 205085009. The next prime is 205085053. The reversal of 205085011 is 110580502.

205085011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205085011 - 2¹ = 205085009 is a prime.

Together with 205085009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (205085311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102542505 + 102542506.

It is an arithmetic number, because the mean of its divisors is an integer number (102542506).

Almost surely, 2^205085011 is an apocalyptic number.

205085011 is a deficient number, since it is larger than the sum of its proper divisors (1).

205085011 is an equidigital number, since it uses as much as digits as its factorization.

205085011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 205085011 is about 14320.7894684616. The cubic root of 205085011 is about 589.7183478041.

The spelling of 205085011 in words is "two hundred five million, eighty-five thousand, eleven".