212668213 has 2 divisors, whose sum is σ = 212668214. Its totient is φ = 212668212.

The previous prime is 212668201. The next prime is 212668297. The reversal of 212668213 is 312866212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212634724 + 33489 = 14582^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 212668213 - 2¹⁷ = 212537141 is a prime.

It is a super-2 number, since 2×212668213² = 90455537641226738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212668613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106334106 + 106334107.

It is an arithmetic number, because the mean of its divisors is an integer number (106334107).

Almost surely, 2^212668213 is an apocalyptic number.

It is an amenable number.

212668213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212668213 is an equidigital number, since it uses as much as digits as its factorization.

212668213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 212668213 is about 14583.1482540637. The cubic root of 212668213 is about 596.8990127781.

The spelling of 212668213 in words is "two hundred twelve million, six hundred sixty-eight thousand, two hundred thirteen".