212816291 has 2 divisors, whose sum is σ = 212816292. Its totient is φ = 212816290.

The previous prime is 212816273. The next prime is 212816299. The reversal of 212816291 is 192618212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212816291 - 2¹⁴ = 212799907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212816299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106408145 + 106408146.

It is an arithmetic number, because the mean of its divisors is an integer number (106408146).

Almost surely, 2^212816291 is an apocalyptic number.

212816291 is a deficient number, since it is larger than the sum of its proper divisors (1).

212816291 is an equidigital number, since it uses as much as digits as its factorization.

212816291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 212816291 is about 14588.2243950386. The cubic root of 212816291 is about 597.0375182061.

It can be divided in two parts, 21281 and 6291, that added together give a palindrome (27572).

The spelling of 212816291 in words is "two hundred twelve million, eight hundred sixteen thousand, two hundred ninety-one".