206541906 has 16 divisors (see below), whose sum is σ = 417343584. Its totient is φ = 68137344.

The previous prime is 206541899. The next prime is 206541917. The reversal of 206541906 is 609145602.

206541906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206541906² = 85319117868225672, which contains 22 as substring.

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, 176860 + ... + 178023.

It is an arithmetic number, because the mean of its divisors is an integer number (26083974).

Almost surely, 2^206541906 is an apocalyptic number.

206541906 is an abundant number, since it is smaller than the sum of its proper divisors (210801678).

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

206541906 is a wasteful number, since it uses less digits than its factorization.

206541906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354985.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 206541906 is about 14371.5658854559. The cubic root of 206541906 is about 591.1114794529. Note that the first 3 decimals are identical.

The spelling of 206541906 in words is "two hundred six million, five hundred forty-one thousand, nine hundred six".