206511055 has 32 divisors (see below), whose sum is σ = 262906560. Its totient is φ = 155550720.

The previous prime is 206511037. The next prime is 206511079. The reversal of 206511055 is 550115602.

It is not a de Polignac number, because 206511055 - 2¹¹ = 206509007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901681 + ... + 901909.

It is an arithmetic number, because the mean of its divisors is an integer number (8215830).

Almost surely, 2^206511055 is an apocalyptic number.

206511055 is a deficient number, since it is larger than the sum of its proper divisors (56395505).

206511055 is a wasteful number, since it uses less digits than its factorization.

206511055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 206511055 is about 14370.4925106970. The cubic root of 206511055 is about 591.0820467038.

Adding to 206511055 its reverse (550115602), we get a palindrome (756626657).

The spelling of 206511055 in words is "two hundred six million, five hundred eleven thousand, fifty-five".