212556 has 12 divisors (see below), whose sum is σ = 495992. Its totient is φ = 70848.

The previous prime is 212507. The next prime is 212557. The reversal of 212556 is 655212.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (212557) 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, 8845 + ... + 8868.

2²¹²⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

212556 is an abundant number, since it is smaller than the sum of its proper divisors (283436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212556 is a wasteful number, since it uses less digits than its factorization.

212556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17720 (or 17718 counting only the distinct ones).

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

The square root of 212556 is about 461.0379593916. The cubic root of 212556 is about 59.6794011014.

Adding to 212556 its reverse (655212), we get a palindrome (867768).

The spelling of 212556 in words is "two hundred twelve thousand, five hundred fifty-six".