212706856 has 32 divisors (see below), whose sum is σ = 424667880. Its totient is φ = 99532800.

The previous prime is 212706847. The next prime is 212706863. The reversal of 212706856 is 658607212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 83429956 + 129276900 = 9134^2 + 11370^2 .

It is an unprimeable number.

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, 20296 + ... + 28936.

Almost surely, 2^212706856 is an apocalyptic number.

It is an amenable number.

212706856 is a deficient number, since it is larger than the sum of its proper divisors (211961024).

212706856 is a wasteful number, since it uses less digits than its factorization.

212706856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8845 (or 8841 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 212706856 is about 14584.4731135547. The cubic root of 212706856 is about 596.9351638814.

The spelling of 212706856 in words is "two hundred twelve million, seven hundred six thousand, eight hundred fifty-six".