51087975 has 36 divisors (see below), whose sum is σ = 89764344. Its totient is φ = 25633280.

The previous prime is 51087947. The next prime is 51087977. The reversal of 51087975 is 57978015.

51087975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51087975 - 2⁵ = 51087943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51087977) 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 35 ways as a sum of consecutive naturals, for example, 20497 + ... + 22853.

It is an arithmetic number, because the mean of its divisors is an integer number (2493454).

Almost surely, 2^51087975 is an apocalyptic number.

51087975 is a deficient number, since it is larger than the sum of its proper divisors (38676369).

51087975 is a wasteful number, since it uses less digits than its factorization.

51087975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 51087975 is about 7147.5852565744. The cubic root of 51087975 is about 371.0560891458.

The spelling of 51087975 in words is "fifty-one million, eighty-seven thousand, nine hundred seventy-five".