51286875 has 40 divisors (see below), whose sum is σ = 90533520. Its totient is φ = 25728000.

The previous prime is 51286867. The next prime is 51286897. The reversal of 51286875 is 57868215.

It is not a de Polignac number, because 51286875 - 2³ = 51286867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31071 + ... + 32679.

It is an arithmetic number, because the mean of its divisors is an integer number (2263338).

Almost surely, 2^51286875 is an apocalyptic number.

51286875 is a deficient number, since it is larger than the sum of its proper divisors (39246645).

51286875 is a wasteful number, since it uses less digits than its factorization.

51286875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1634 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 51286875 is about 7161.4855302514. The cubic root of 51286875 is about 371.5370078225.

It can be divided in two parts, 51 and 286875, that multiplied together give a square (14630625 = 3825²).

The spelling of 51286875 in words is "fifty-one million, two hundred eighty-six thousand, eight hundred seventy-five".