51868868 has 12 divisors (see below), whose sum is σ = 90843900. Its totient is φ = 25913472.

The previous prime is 51868867. The next prime is 51868877. The reversal of 51868868 is 86886815.

51868868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 43059844 + 8809024 = 6562^2 + 2968^2 .

It is not an unprimeable number, because it can be changed into a prime (51868867) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 10256.

It is an arithmetic number, because the mean of its divisors is an integer number (7570325).

Almost surely, 2^51868868 is an apocalyptic number.

It is an amenable number.

51868868 is a deficient number, since it is larger than the sum of its proper divisors (38975032).

51868868 is a wasteful number, since it uses less digits than its factorization.

51868868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10486 (or 10484 counting only the distinct ones).

The product of its digits is 737280, while the sum is 50.

The square root of 51868868 is about 7202.0044432088. The cubic root of 51868868 is about 372.9371005161.

The spelling of 51868868 in words is "fifty-one million, eight hundred sixty-eight thousand, eight hundred sixty-eight".