209082205 has 8 divisors (see below), whose sum is σ = 253119672. Its totient is φ = 165785088.

The previous prime is 209082193. The next prime is 209082217. The reversal of 209082205 is 502280902.

It is an interprime number because it is at equal distance from previous prime (209082193) and next prime (209082217).

It can be written as a sum of positive squares in 4 ways, for example, as 4334724 + 204747481 = 2082^2 + 14309^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 209082205 - 2⁷ = 209082077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184464 + ... + 185593.

It is an arithmetic number, because the mean of its divisors is an integer number (31639959).

Almost surely, 2^209082205 is an apocalyptic number.

It is an amenable number.

209082205 is a deficient number, since it is larger than the sum of its proper divisors (44037467).

209082205 is a wasteful number, since it uses less digits than its factorization.

209082205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370175.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 209082205 is about 14459.6751346633. The cubic root of 209082205 is about 593.5250097873.

The spelling of 209082205 in words is "two hundred nine million, eighty-two thousand, two hundred five".