205102885 has 8 divisors (see below), whose sum is σ = 265056120. Its totient is φ = 151460544.

The previous prime is 205102871. The next prime is 205102889. The reversal of 205102885 is 588201502.

It can be written as a sum of positive squares in 4 ways, for example, as 527076 + 204575809 = 726^2 + 14303^2 .

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 205102885 - 2²⁵ = 171548453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205102889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577650 + ... + 1577779.

It is an arithmetic number, because the mean of its divisors is an integer number (33132015).

Almost surely, 2^205102885 is an apocalyptic number.

It is an amenable number.

205102885 is a deficient number, since it is larger than the sum of its proper divisors (59953235).

205102885 is a wasteful number, since it uses less digits than its factorization.

205102885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155447.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 205102885 is about 14321.4135126390. The cubic root of 205102885 is about 589.7354794308.

The spelling of 205102885 in words is "two hundred five million, one hundred two thousand, eight hundred eighty-five".