205241065 has 4 divisors (see below), whose sum is σ = 246289284. Its totient is φ = 164192848.

The previous prime is 205241041. The next prime is 205241089. The reversal of 205241065 is 560142502.

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

It is an interprime number because it is at equal distance from previous prime (205241041) and next prime (205241089).

It can be written as a sum of positive squares in 2 ways, for example, as 137804121 + 67436944 = 11739^2 + 8212^2 .

It is a cyclic number.

It is not a de Polignac number, because 205241065 - 2¹³ = 205232873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20524102 + ... + 20524111.

It is an arithmetic number, because the mean of its divisors is an integer number (61572321).

Almost surely, 2^205241065 is an apocalyptic number.

It is an amenable number.

205241065 is a deficient number, since it is larger than the sum of its proper divisors (41048219).

205241065 is an equidigital number, since it uses as much as digits as its factorization.

205241065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41048218.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 205241065 is about 14326.2369448505. The cubic root of 205241065 is about 589.8678867269.

Adding to 205241065 its reverse (560142502), we get a palindrome (765383567).

The spelling of 205241065 in words is "two hundred five million, two hundred forty-one thousand, sixty-five".