205260317 has 2 divisors, whose sum is σ = 205260318. Its totient is φ = 205260316.

The previous prime is 205260313. The next prime is 205260323. The reversal of 205260317 is 713062502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134884996 + 70375321 = 11614^2 + 8389^2 .

It is a cyclic number.

It is not a de Polignac number, because 205260317 - 2² = 205260313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205260313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102630158 + 102630159.

It is an arithmetic number, because the mean of its divisors is an integer number (102630159).

Almost surely, 2^205260317 is an apocalyptic number.

It is an amenable number.

205260317 is a deficient number, since it is larger than the sum of its proper divisors (1).

205260317 is an equidigital number, since it uses as much as digits as its factorization.

205260317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 205260317 is about 14326.9088431525. The cubic root of 205260317 is about 589.8863297246.

The spelling of 205260317 in words is "two hundred five million, two hundred sixty thousand, three hundred seventeen".