206042845 has 8 divisors (see below), whose sum is σ = 247502520. Its totient is φ = 164666880.

The previous prime is 206042843. The next prime is 206042861. The reversal of 206042845 is 548240602.

It can be written as a sum of positive squares in 4 ways, for example, as 42484324 + 163558521 = 6518^2 + 12789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206042845 - 2¹ = 206042843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206042843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15376 + ... + 25465.

It is an arithmetic number, because the mean of its divisors is an integer number (30937815).

Almost surely, 2^206042845 is an apocalyptic number.

It is an amenable number.

206042845 is a deficient number, since it is larger than the sum of its proper divisors (41459675).

206042845 is a wasteful number, since it uses less digits than its factorization.

206042845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41855.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 206042845 is about 14354.1925931067. The cubic root of 206042845 is about 590.6350005119.

The spelling of 206042845 in words is "two hundred six million, forty-two thousand, eight hundred forty-five".