210342317 has 2 divisors, whose sum is σ = 210342318. Its totient is φ = 210342316.

The previous prime is 210342287. The next prime is 210342323. The reversal of 210342317 is 713243012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133148521 + 77193796 = 11539^2 + 8786^2 .

It is a cyclic number.

It is not a de Polignac number, because 210342317 - 2¹² = 210338221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210342292 and 210342301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210342367) 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 as a sum of consecutive naturals, namely, 105171158 + 105171159.

It is an arithmetic number, because the mean of its divisors is an integer number (105171159).

Almost surely, 2^210342317 is an apocalyptic number.

It is an amenable number.

210342317 is a deficient number, since it is larger than the sum of its proper divisors (1).

210342317 is an equidigital number, since it uses as much as digits as its factorization.

210342317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 210342317 is about 14503.1829954669. The cubic root of 210342317 is about 594.7149890784.

Adding to 210342317 its reverse (713243012), we get a palindrome (923585329).

The spelling of 210342317 in words is "two hundred ten million, three hundred forty-two thousand, three hundred seventeen".