206338565 has 8 divisors (see below), whose sum is σ = 249798168. Its totient is φ = 163609600.

The previous prime is 206338549. The next prime is 206338607. The reversal of 206338565 is 565833602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13184161 + 193154404 = 3631^2 + 13898^2 .

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

It is not a de Polignac number, because 206338565 - 2⁴ = 206338549 is a prime.

It is a Duffinian number.

It is a congruent 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, 182036 + ... + 183165.

It is an arithmetic number, because the mean of its divisors is an integer number (31224771).

Almost surely, 2^206338565 is an apocalyptic number.

It is an amenable number.

206338565 is a deficient number, since it is larger than the sum of its proper divisors (43459603).

206338565 is a wasteful number, since it uses less digits than its factorization.

206338565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365319.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 206338565 is about 14364.4897229244. The cubic root of 206338565 is about 590.9174322043.

The spelling of 206338565 in words is "two hundred six million, three hundred thirty-eight thousand, five hundred sixty-five".