51366128 has 20 divisors (see below), whose sum is σ = 108569688. Its totient is φ = 23348160.

The previous prime is 51366121. The next prime is 51366137. The reversal of 51366128 is 82166315.

It is a happy number.

51366128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51366094 and 51366103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51366121) 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, 145751 + ... + 146102.

Almost surely, 2^51366128 is an apocalyptic number.

It is an amenable number.

51366128 is an abundant number, since it is smaller than the sum of its proper divisors (57203560).

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

51366128 is a wasteful number, since it uses less digits than its factorization.

51366128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291872 (or 291866 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 51366128 is about 7167.0166736237. The cubic root of 51366128 is about 371.7282865741.

The spelling of 51366128 in words is "fifty-one million, three hundred sixty-six thousand, one hundred twenty-eight".