212855 has 4 divisors (see below), whose sum is σ = 255432. Its totient is φ = 170280.

The previous prime is 212851. The next prime is 212867. The reversal of 212855 is 558212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212855 - 2² = 212851 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 212855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21281 + ... + 21290.

It is an arithmetic number, because the mean of its divisors is an integer number (63858).

2²¹²⁸⁵⁵ is an apocalyptic number.

212855 is a deficient number, since it is larger than the sum of its proper divisors (42577).

212855 is an equidigital number, since it uses as much as digits as its factorization.

212855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42576.

The product of its digits is 800, while the sum is 23.

The square root of 212855 is about 461.3621137458. The cubic root of 212855 is about 59.7073714251.

Adding to 212855 its sum of digits (23), we get a triangular number (212878 = T₆₅₂).

The spelling of 212855 in words is "two hundred twelve thousand, eight hundred fifty-five".