206214685 has 4 divisors (see below), whose sum is σ = 247457628. Its totient is φ = 164971744.

The previous prime is 206214683. The next prime is 206214719. The reversal of 206214685 is 586412602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122345721 + 83868964 = 11061^2 + 9158^2 .

It is a cyclic number.

It is not a de Polignac number, because 206214685 - 2¹ = 206214683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206214685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206214683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20621464 + ... + 20621473.

It is an arithmetic number, because the mean of its divisors is an integer number (61864407).

Almost surely, 2^206214685 is an apocalyptic number.

It is an amenable number.

206214685 is a deficient number, since it is larger than the sum of its proper divisors (41242943).

206214685 is an equidigital number, since it uses as much as digits as its factorization.

206214685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41242942.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 206214685 is about 14360.1770532260. The cubic root of 206214685 is about 590.7991516718.

The spelling of 206214685 in words is "two hundred six million, two hundred fourteen thousand, six hundred eighty-five".