212816213 has 2 divisors, whose sum is σ = 212816214. Its totient is φ = 212816212.

The previous prime is 212816203. The next prime is 212816273. The reversal of 212816213 is 312618212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151240804 + 61575409 = 12298^2 + 7847^2 .

It is a cyclic number.

It is not a de Polignac number, because 212816213 - 2⁸ = 212815957 is a prime.

It is a super-2 number, since 2×212816213² = 90581481031322738, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212816203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106408106 + 106408107.

It is an arithmetic number, because the mean of its divisors is an integer number (106408107).

Almost surely, 2^212816213 is an apocalyptic number.

It is an amenable number.

212816213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212816213 is an equidigital number, since it uses as much as digits as its factorization.

212816213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 212816213 is about 14588.2217216493. The cubic root of 212816213 is about 597.0374452653.

The spelling of 212816213 in words is "two hundred twelve million, eight hundred sixteen thousand, two hundred thirteen".