51500125 has 8 divisors (see below), whose sum is σ = 64272312. Its totient is φ = 41200000.

The previous prime is 51500101. The next prime is 51500147. The reversal of 51500125 is 52100515.

51500125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 549081 + 50951044 = 741^2 + 7138^2 .

It is not a de Polignac number, because 51500125 - 2⁷ = 51499997 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 205876 + ... + 206125.

It is an arithmetic number, because the mean of its divisors is an integer number (8034039).

Almost surely, 2^51500125 is an apocalyptic number.

It is an amenable number.

51500125 is a deficient number, since it is larger than the sum of its proper divisors (12772187).

51500125 is an equidigital number, since it uses as much as digits as its factorization.

51500125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412016 (or 412006 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 51500125 is about 7176.3587563611. The cubic root of 51500125 is about 372.0512440487.

The spelling of 51500125 in words is "fifty-one million, five hundred thousand, one hundred twenty-five".