205017271 has 8 divisors (see below), whose sum is σ = 208742400. Its totient is φ = 201300600.

The previous prime is 205017251. The next prime is 205017287. The reversal of 205017271 is 172710502.

It is a happy number.

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 205017271 - 2¹⁵ = 204984503 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 (205017251) 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 7 ways as a sum of consecutive naturals, for example, 66400 + ... + 69418.

It is an arithmetic number, because the mean of its divisors is an integer number (26092800).

Almost surely, 2^205017271 is an apocalyptic number.

205017271 is a deficient number, since it is larger than the sum of its proper divisors (3725129).

205017271 is a wasteful number, since it uses less digits than its factorization.

205017271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 205017271 is about 14318.4241800556. The cubic root of 205017271 is about 589.6534122607.

Adding to 205017271 its reverse (172710502), we get a palindrome (377727773).

It can be divided in two parts, 20501 and 7271, that added together give a palindrome (27772).

The spelling of 205017271 in words is "two hundred five million, seventeen thousand, two hundred seventy-one".