205273885 has 4 divisors (see below), whose sum is σ = 246328668. Its totient is φ = 164219104.

The previous prime is 205273841. The next prime is 205273903. The reversal of 205273885 is 588372502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588372502 = 2 ⋅294186251.

It can be written as a sum of positive squares in 2 ways, for example, as 56385081 + 148888804 = 7509^2 + 12202^2 .

It is a cyclic number.

It is not a de Polignac number, because 205273885 - 2¹³ = 205265693 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 20527384 + ... + 20527393.

It is an arithmetic number, because the mean of its divisors is an integer number (61582167).

Almost surely, 2^205273885 is an apocalyptic number.

It is an amenable number.

205273885 is a deficient number, since it is larger than the sum of its proper divisors (41054783).

205273885 is an equidigital number, since it uses as much as digits as its factorization.

205273885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41054782.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 205273885 is about 14327.3823498921. The cubic root of 205273885 is about 589.8993268811.

The spelling of 205273885 in words is "two hundred five million, two hundred seventy-three thousand, eight hundred eighty-five".