212102056 has 32 divisors (see below), whose sum is σ = 422541000. Its totient is φ = 99622656.

The previous prime is 212102039. The next prime is 212102089. The reversal of 212102056 is 650201212.

It can be written as a sum of positive squares in 4 ways, for example, as 211237156 + 864900 = 14534^2 + 930^2 .

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, 3771 + ... + 20938.

Almost surely, 2^212102056 is an apocalyptic number.

It is an amenable number.

212102056 is a deficient number, since it is larger than the sum of its proper divisors (210438944).

212102056 is a wasteful number, since it uses less digits than its factorization.

212102056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24781 (or 24777 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 212102056 is about 14563.7239743137. The cubic root of 212102056 is about 596.3688616471.

Adding to 212102056 its reverse (650201212), we get a palindrome (862303268).

The spelling of 212102056 in words is "two hundred twelve million, one hundred two thousand, fifty-six".