212851 has 2 divisors, whose sum is σ = 212852. Its totient is φ = 212850.

The previous prime is 212843. The next prime is 212867. The reversal of 212851 is 158212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212851 - 2³ = 212843 is a prime.

It is a Chen prime.

212851 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (212801) 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, 106425 + 106426.

It is an arithmetic number, because the mean of its divisors is an integer number (106426).

2²¹²⁸⁵¹ is an apocalyptic number.

212851 is a deficient number, since it is larger than the sum of its proper divisors (1).

212851 is an equidigital number, since it uses as much as digits as its factorization.

212851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 19.

The square root of 212851 is about 461.3577787358. The cubic root of 212851 is about 59.7069974131.

The spelling of 212851 in words is "two hundred twelve thousand, eight hundred fifty-one".