212118656 has 64 divisors (see below), whose sum is σ = 458045280. Its totient is φ = 97456128.

The previous prime is 212118649. The next prime is 212118659. The reversal of 212118656 is 656811212.

212118656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (212118659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92435 + ... + 94701.

Almost surely, 2^212118656 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 212118656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229022640).

212118656 is an abundant number, since it is smaller than the sum of its proper divisors (245926624).

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

212118656 is a wasteful number, since it uses less digits than its factorization.

212118656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341 (or 2329 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 212118656 is about 14564.2938723441. The cubic root of 212118656 is about 596.3844193540.

Adding to 212118656 its reverse (656811212), we get a palindrome (868929868).

The spelling of 212118656 in words is "two hundred twelve million, one hundred eighteen thousand, six hundred fifty-six".