205195853 has 4 divisors (see below), whose sum is σ = 205233660. Its totient is φ = 205158048.

The previous prime is 205195847. The next prime is 205195867. The reversal of 205195853 is 358591502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182709289 + 22486564 = 13517^2 + 4742^2 .

It is a cyclic number.

It is not a de Polignac number, because 205195853 - 2²⁰ = 204147277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205195813) by changing a digit.

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, 9050 + ... + 22187.

It is an arithmetic number, because the mean of its divisors is an integer number (51308415).

Almost surely, 2^205195853 is an apocalyptic number.

It is an amenable number.

205195853 is a deficient number, since it is larger than the sum of its proper divisors (37807).

205195853 is an equidigital number, since it uses as much as digits as its factorization.

205195853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37806.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 205195853 is about 14324.6589139148. The cubic root of 205195853 is about 589.8245700780.

The spelling of 205195853 in words is "two hundred five million, one hundred ninety-five thousand, eight hundred fifty-three".