205955956 has 12 divisors (see below), whose sum is σ = 369214020. Its totient is φ = 100466240.

The previous prime is 205955917. The next prime is 205955963. The reversal of 205955956 is 659559502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 192265956 = 3700^2 + 13866^2 .

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 627751 + ... + 628078.

It is an arithmetic number, because the mean of its divisors is an integer number (30767835).

Almost surely, 2^205955956 is an apocalyptic number.

It is an amenable number.

205955956 is a deficient number, since it is larger than the sum of its proper divisors (163258064).

205955956 is a wasteful number, since it uses less digits than its factorization.

205955956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255874 (or 1255872 counting only the distinct ones).

The product of its (nonzero) digits is 607500, while the sum is 46.

The square root of 205955956 is about 14351.1656669415. The cubic root of 205955956 is about 590.5519645457.

The spelling of 205955956 in words is "two hundred five million, nine hundred fifty-five thousand, nine hundred fifty-six".