51503875 has 8 divisors (see below), whose sum is σ = 64276992. Its totient is φ = 41203000.

The previous prime is 51503867. The next prime is 51503891. The reversal of 51503875 is 57830515.

It is not a de Polignac number, because 51503875 - 2³ = 51503867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51503875.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205891 + ... + 206140.

It is an arithmetic number, because the mean of its divisors is an integer number (8034624).

Almost surely, 2^51503875 is an apocalyptic number.

51503875 is a deficient number, since it is larger than the sum of its proper divisors (12773117).

51503875 is an equidigital number, since it uses as much as digits as its factorization.

51503875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412046 (or 412036 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 51503875 is about 7176.6200261683. The cubic root of 51503875 is about 372.0602741776.

It can be divided in two parts, 5150 and 3875, that added together give a square (9025 = 95²).

The spelling of 51503875 in words is "fifty-one million, five hundred three thousand, eight hundred seventy-five".