205250217 has 8 divisors (see below), whose sum is σ = 288070560. Its totient is φ = 129631680.

The previous prime is 205250207. The next prime is 205250219. The reversal of 205250217 is 712052502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205250217 - 2¹⁰ = 205249193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205250219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1800384 + ... + 1800497.

It is an arithmetic number, because the mean of its divisors is an integer number (36008820).

Almost surely, 2^205250217 is an apocalyptic number.

It is an amenable number.

205250217 is a deficient number, since it is larger than the sum of its proper divisors (82820343).

205250217 is a wasteful number, since it uses less digits than its factorization.

205250217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600903.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 205250217 is about 14326.5563552446. The cubic root of 205250217 is about 589.8766542879.

The spelling of 205250217 in words is "two hundred five million, two hundred fifty thousand, two hundred seventeen".