212656 has 10 divisors (see below), whose sum is σ = 412052. Its totient is φ = 106320.

The previous prime is 212651. The next prime is 212669. The reversal of 212656 is 656212.

It is not an unprimeable number, because it can be changed into a prime (212651) by changing a digit.

212656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630 + ... + 6661.

2²¹²⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

212656 is a deficient number, since it is larger than the sum of its proper divisors (199396).

212656 is a wasteful number, since it uses less digits than its factorization.

212656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299 (or 13293 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 212656 is about 461.1463975789. The cubic root of 212656 is about 59.6887586424.

Adding to 212656 its reverse (656212), we get a palindrome (868868).

Subtracting 212656 from its reverse (656212), we obtain a square (443556 = 666²).

It can be divided in two parts, 212 and 656, that added together give a palindrome (868).

The spelling of 212656 in words is "two hundred twelve thousand, six hundred fifty-six".