205091041 has 3 divisors (see below), whose sum is σ = 205105363. Its totient is φ = 205076720.

The previous prime is 205091017. The next prime is 205091099. The reversal of 205091041 is 140190502.

The square root of 205091041 is 14321.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 140190502 = 2 ⋅70095251.

It can be written as a sum of positive squares in only one way, i.e., 2313441 + 202777600 = 1521^2 + 14240^2 .

It is not a de Polignac number, because 205091041 - 2¹¹ = 205088993 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205091441) 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 2 ways as a sum of consecutive naturals, for example, 7161 + ... + 21481.

Almost surely, 2^205091041 is an apocalyptic number.

205091041 is the 14321-st square number.

205091041 is the 7161-st centered octagonal number.

It is an amenable number.

205091041 is a deficient number, since it is larger than the sum of its proper divisors (14322).

205091041 is an frugal number, since it uses more digits than its factorization.

205091041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28642 (or 14321 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The cubic root of 205091041 is about 589.7241274672.

The spelling of 205091041 in words is "two hundred five million, ninety-one thousand, forty-one".