212843 has 2 divisors, whose sum is σ = 212844. Its totient is φ = 212842.

The previous prime is 212837. The next prime is 212851. The reversal of 212843 is 348212.

212843 is nontrivially palindromic in base 13.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212843 - 2⁴ = 212827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106421 + 106422.

It is an arithmetic number, because the mean of its divisors is an integer number (106422).

2²¹²⁸⁴³ is an apocalyptic number.

212843 is a deficient number, since it is larger than the sum of its proper divisors (1).

212843 is an equidigital number, since it uses as much as digits as its factorization.

212843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 212843 is about 461.3491085935. The cubic root of 212843 is about 59.7062493750.

The spelling of 212843 in words is "two hundred twelve thousand, eight hundred forty-three".