212655 has 8 divisors (see below), whose sum is σ = 340272. Its totient is φ = 113408.

The previous prime is 212651. The next prime is 212669. The reversal of 212655 is 556212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212655 - 2² = 212651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212651) 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 7 ways as a sum of consecutive naturals, for example, 7074 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (42534).

2²¹²⁶⁵⁵ is an apocalyptic number.

212655 is a deficient number, since it is larger than the sum of its proper divisors (127617).

212655 is a wasteful number, since it uses less digits than its factorization.

212655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14185.

The product of its digits is 600, while the sum is 21.

The square root of 212655 is about 461.1453133233. The cubic root of 212655 is about 59.6886650815.

Adding to 212655 its reverse (556212), we get a palindrome (768867).

It can be divided in two parts, 21 and 2655, that multiplied together give a palindrome (55755).

The spelling of 212655 in words is "two hundred twelve thousand, six hundred fifty-five".