212016317 has 2 divisors, whose sum is σ = 212016318. Its totient is φ = 212016316.

The previous prime is 212016313. The next prime is 212016373. The reversal of 212016317 is 713610212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127486681 + 84529636 = 11291^2 + 9194^2 .

It is a cyclic number.

It is not a de Polignac number, because 212016317 - 2² = 212016313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212016292 and 212016301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212016313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106008158 + 106008159.

It is an arithmetic number, because the mean of its divisors is an integer number (106008159).

Almost surely, 2^212016317 is an apocalyptic number.

It is an amenable number.

212016317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212016317 is an equidigital number, since it uses as much as digits as its factorization.

212016317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 212016317 is about 14560.7800958602. The cubic root of 212016317 is about 596.2884931645.

Adding to 212016317 its reverse (713610212), we get a palindrome (925626529).

The spelling of 212016317 in words is "two hundred twelve million, sixteen thousand, three hundred seventeen".