206705055 has 16 divisors (see below), whose sum is σ = 341397504. Its totient is φ = 106686240.

The previous prime is 206705053. The next prime is 206705087. The reversal of 206705055 is 550507602.

It is not a de Polignac number, because 206705055 - 2¹ = 206705053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206705053) 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 15 ways as a sum of consecutive naturals, for example, 221799 + ... + 222728.

It is an arithmetic number, because the mean of its divisors is an integer number (21337344).

Almost surely, 2^206705055 is an apocalyptic number.

206705055 is a deficient number, since it is larger than the sum of its proper divisors (134692449).

206705055 is a wasteful number, since it uses less digits than its factorization.

206705055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444566.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 206705055 is about 14377.2408688176. The cubic root of 206705055 is about 591.2670796199.

The spelling of 206705055 in words is "two hundred six million, seven hundred five thousand, fifty-five".