206865045 has 24 divisors (see below), whose sum is σ = 366908256. Its totient is φ = 107761248.

The previous prime is 206865041. The next prime is 206865047. The reversal of 206865045 is 540568602.

It is not a de Polignac number, because 206865045 - 2² = 206865041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206865041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51519 + ... + 55388.

It is an arithmetic number, because the mean of its divisors is an integer number (15287844).

Almost surely, 2^206865045 is an apocalyptic number.

It is an amenable number.

206865045 is a deficient number, since it is larger than the sum of its proper divisors (160043211).

206865045 is a wasteful number, since it uses less digits than its factorization.

206865045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106961 (or 106958 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 206865045 is about 14382.8037948100. The cubic root of 206865045 is about 591.4195874602.

The spelling of 206865045 in words is "two hundred six million, eight hundred sixty-five thousand, forty-five".