206151806 has 16 divisors (see below), whose sum is σ = 368769024. Its totient is φ = 84509304.

The previous prime is 206151797. The next prime is 206151851. The reversal of 206151806 is 608151602.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 319790 + ... + 320433.

It is an arithmetic number, because the mean of its divisors is an integer number (23048064).

Almost surely, 2^206151806 is an apocalyptic number.

206151806 is a deficient number, since it is larger than the sum of its proper divisors (162617218).

206151806 is a wasteful number, since it uses less digits than its factorization.

206151806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640255.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 206151806 is about 14357.9875330772. The cubic root of 206151806 is about 590.7390967242.

The spelling of 206151806 in words is "two hundred six million, one hundred fifty-one thousand, eight hundred six".