206905122 has 24 divisors (see below), whose sum is σ = 448795776. Its totient is φ = 68891256.

The previous prime is 206905099. The next prime is 206905157. The reversal of 206905122 is 221509602.

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 11 ways as a sum of consecutive naturals, for example, 11463 + ... + 23349.

It is an arithmetic number, because the mean of its divisors is an integer number (18699824).

Almost surely, 2^206905122 is an apocalyptic number.

206905122 is an abundant number, since it is smaller than the sum of its proper divisors (241890654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206905122 is a wasteful number, since it uses less digits than its factorization.

206905122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12862 (or 12859 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 206905122 is about 14384.1969536015. The cubic root of 206905122 is about 591.4577778857.

The spelling of 206905122 in words is "two hundred six million, nine hundred five thousand, one hundred twenty-two".