212812656 has 80 divisors (see below), whose sum is σ = 634626048. Its totient is φ = 60192000.

The previous prime is 212812651. The next prime is 212812667. The reversal of 212812656 is 656218212.

212812656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212812651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30801 + ... + 37071.

Almost surely, 2^212812656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212812656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317313024).

212812656 is an abundant number, since it is smaller than the sum of its proper divisors (421813392).

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

212812656 is a wasteful number, since it uses less digits than its factorization.

212812656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6384 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 212812656 is about 14588.0998077200. The cubic root of 212812656 is about 597.0341189617.

The spelling of 212812656 in words is "two hundred twelve million, eight hundred twelve thousand, six hundred fifty-six".