51887128 has 16 divisors (see below), whose sum is σ = 103011480. Its totient is φ = 24417408.

The previous prime is 51887123. The next prime is 51887153. The reversal of 51887128 is 82178815.

51887128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51887123) 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, 190626 + ... + 190897.

Almost surely, 2^51887128 is an apocalyptic number.

It is an amenable number.

51887128 is a deficient number, since it is larger than the sum of its proper divisors (51124352).

51887128 is a wasteful number, since it uses less digits than its factorization.

51887128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381546 (or 381542 counting only the distinct ones).

The product of its digits is 35840, while the sum is 40.

The square root of 51887128 is about 7203.2720342911. The cubic root of 51887128 is about 372.9808585078.

The spelling of 51887128 in words is "fifty-one million, eight hundred eighty-seven thousand, one hundred twenty-eight".