51004375 has 20 divisors (see below), whose sum is σ = 64604320. Its totient is φ = 40248000.

The previous prime is 51004367. The next prime is 51004381. The reversal of 51004375 is 57340015.

51004375 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 51004375 - 2³ = 51004367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 48859 + ... + 49891.

It is an arithmetic number, because the mean of its divisors is an integer number (3230216).

Almost surely, 2^51004375 is an apocalyptic number.

51004375 is a deficient number, since it is larger than the sum of its proper divisors (13599945).

51004375 is an equidigital number, since it uses as much as digits as its factorization.

51004375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 51004375 is about 7141.7347332423. The cubic root of 51004375 is about 370.8535807935.

The spelling of 51004375 in words is "fifty-one million, four thousand, three hundred seventy-five".