205317201 has 4 divisors (see below), whose sum is σ = 273756272. Its totient is φ = 136878132.

The previous prime is 205317199. The next prime is 205317223. The reversal of 205317201 is 102713502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205317201 - 2¹ = 205317199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205317001) 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, 34219531 + ... + 34219536.

It is an arithmetic number, because the mean of its divisors is an integer number (68439068).

Almost surely, 2^205317201 is an apocalyptic number.

It is an amenable number.

205317201 is a deficient number, since it is larger than the sum of its proper divisors (68439071).

205317201 is an equidigital number, since it uses as much as digits as its factorization.

205317201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68439070.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 205317201 is about 14328.8939210254. The cubic root of 205317201 is about 589.9408166240.

The spelling of 205317201 in words is "two hundred five million, three hundred seventeen thousand, two hundred one".