51275987 has 8 divisors (see below), whose sum is σ = 59427072. Its totient is φ = 43331400.

The previous prime is 51275981. The next prime is 51276011. The reversal of 51275987 is 78957215.

51275987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51275987 - 2⁶ = 51275923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51275981) 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 7 ways as a sum of consecutive naturals, for example, 51089 + ... + 52082.

It is an arithmetic number, because the mean of its divisors is an integer number (7428384).

Almost surely, 2^51275987 is an apocalyptic number.

51275987 is a deficient number, since it is larger than the sum of its proper divisors (8151085).

51275987 is a wasteful number, since it uses less digits than its factorization.

51275987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103249.

The product of its digits is 176400, while the sum is 44.

The square root of 51275987 is about 7160.7253124247. The cubic root of 51275987 is about 371.5107140177.

The spelling of 51275987 in words is "fifty-one million, two hundred seventy-five thousand, nine hundred eighty-seven".