206523985 has 8 divisors (see below), whose sum is σ = 248159016. Its totient is φ = 164999040.

The previous prime is 206523931. The next prime is 206524001. The reversal of 206523985 is 589325602.

206523985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11614464 + 194909521 = 3408^2 + 13961^2 .

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

It is not a de Polignac number, because 206523985 - 2¹¹ = 206521937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23334 + ... + 30943.

It is an arithmetic number, because the mean of its divisors is an integer number (31019877).

Almost surely, 2^206523985 is an apocalyptic number.

It is an amenable number.

206523985 is a deficient number, since it is larger than the sum of its proper divisors (41635031).

206523985 is an equidigital number, since it uses as much as digits as its factorization.

206523985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55043.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 206523985 is about 14370.9423838522. The cubic root of 206523985 is about 591.0943826557.

The spelling of 206523985 in words is "two hundred six million, five hundred twenty-three thousand, nine hundred eighty-five".