205232317 has 2 divisors, whose sum is σ = 205232318. Its totient is φ = 205232316.

The previous prime is 205232311. The next prime is 205232359. The reversal of 205232317 is 713232502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169364196 + 35868121 = 13014^2 + 5989^2 .

It is a cyclic number.

It is not a de Polignac number, because 205232317 - 2¹¹ = 205230269 is a prime.

It is a super-3 number, since 3×205232317³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205232291 and 205232300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205232311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102616158 + 102616159.

It is an arithmetic number, because the mean of its divisors is an integer number (102616159).

Almost surely, 2^205232317 is an apocalyptic number.

It is an amenable number.

205232317 is a deficient number, since it is larger than the sum of its proper divisors (1).

205232317 is an equidigital number, since it uses as much as digits as its factorization.

205232317 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 25.

The square root of 205232317 is about 14325.9316276464. The cubic root of 205232317 is about 589.8595059518.

Adding to 205232317 its reverse (713232502), we get a palindrome (918464819).

The spelling of 205232317 in words is "two hundred five million, two hundred thirty-two thousand, three hundred seventeen".