205255317 has 8 divisors (see below), whose sum is σ = 281070496. Its totient is φ = 133138512.

The previous prime is 205255313. The next prime is 205255333. The reversal of 205255317 is 713552502.

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

It is not a de Polignac number, because 205255317 - 2² = 205255313 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 (205255313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924463 + ... + 924684.

It is an arithmetic number, because the mean of its divisors is an integer number (35133812).

Almost surely, 2^205255317 is an apocalyptic number.

It is an amenable number.

205255317 is a deficient number, since it is larger than the sum of its proper divisors (75815179).

205255317 is a wasteful number, since it uses less digits than its factorization.

205255317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849187.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 205255317 is about 14326.7343452721. The cubic root of 205255317 is about 589.8815399441.

The spelling of 205255317 in words is "two hundred five million, two hundred fifty-five thousand, three hundred seventeen".