206226865 has 8 divisors (see below), whose sum is σ = 266508648. Its totient is φ = 152290560.

The previous prime is 206226857. The next prime is 206226887. The reversal of 206226865 is 568622602.

It can be written as a sum of positive squares in 4 ways, for example, as 13905441 + 192321424 = 3729^2 + 13868^2 .

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

It is not a de Polignac number, because 206226865 - 2³ = 206226857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1586296 + ... + 1586425.

It is an arithmetic number, because the mean of its divisors is an integer number (33313581).

Almost surely, 2^206226865 is an apocalyptic number.

It is an amenable number.

206226865 is a deficient number, since it is larger than the sum of its proper divisors (60281783).

206226865 is a wasteful number, since it uses less digits than its factorization.

206226865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3172739.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 206226865 is about 14360.6011364427. The cubic root of 206226865 is about 590.8107832262.

The spelling of 206226865 in words is "two hundred six million, two hundred twenty-six thousand, eight hundred sixty-five".