212304317 has 2 divisors, whose sum is σ = 212304318. Its totient is φ = 212304316.

The previous prime is 212304293. The next prime is 212304319. The reversal of 212304317 is 713403212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196392196 + 15912121 = 14014^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 212304317 - 2²² = 208110013 is a prime.

Together with 212304319, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212304292 and 212304301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212304319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106152158 + 106152159.

It is an arithmetic number, because the mean of its divisors is an integer number (106152159).

Almost surely, 2^212304317 is an apocalyptic number.

It is an amenable number.

212304317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212304317 is an equidigital number, since it uses as much as digits as its factorization.

212304317 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 212304317 is about 14570.6663196986. Note that the first 3 decimals coincide. The cubic root of 212304317 is about 596.5583676535.

Adding to 212304317 its reverse (713403212), we get a palindrome (925707529).

The spelling of 212304317 in words is "two hundred twelve million, three hundred four thousand, three hundred seventeen".