206555206 has 32 divisors (see below), whose sum is σ = 364992768. Its totient is φ = 86430240.

The previous prime is 206555183. The next prime is 206555291. The reversal of 206555206 is 602555602.

It is a congruent number.

It is an unprimeable number.

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, 138541 + ... + 140023.

It is an arithmetic number, because the mean of its divisors is an integer number (11406024).

Almost surely, 2^206555206 is an apocalyptic number.

206555206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

206555206 is a deficient number, since it is larger than the sum of its proper divisors (158437562).

206555206 is a wasteful number, since it uses less digits than its factorization.

206555206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 206555206 is about 14372.0285972440. The cubic root of 206555206 is about 591.1241671347.

The spelling of 206555206 in words is "two hundred six million, five hundred fifty-five thousand, two hundred six".