212887 has 4 divisors (see below), whose sum is σ = 213840. Its totient is φ = 211936.

The previous prime is 212881. The next prime is 212897. The reversal of 212887 is 788212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212887 - 2¹¹ = 210839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212881) 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 in 3 ways as a sum of consecutive naturals, for example, 63 + ... + 655.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2²¹²⁸⁸⁷ is an apocalyptic number.

212887 is a deficient number, since it is larger than the sum of its proper divisors (953).

212887 is an equidigital number, since it uses as much as digits as its factorization.

212887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952.

The product of its digits is 1792, while the sum is 28.

The square root of 212887 is about 461.3967923599. The cubic root of 212887 is about 59.7103633526.

It can be divided in two parts, 2128 and 87, that multiplied together give a triangular number (185136 = T₆₀₈).

The spelling of 212887 in words is "two hundred twelve thousand, eight hundred eighty-seven".