51315125 has 16 divisors (see below), whose sum is σ = 65537472. Its totient is φ = 40093200.

The previous prime is 51315113. The next prime is 51315157. The reversal of 51315125 is 52151315.

It is a happy number.

It is not a de Polignac number, because 51315125 - 2⁴ = 51315109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51315125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (4096092).

Almost surely, 2^51315125 is an apocalyptic number.

It is an amenable number.

51315125 is a deficient number, since it is larger than the sum of its proper divisors (14222347).

51315125 is an equidigital number, since it uses as much as digits as its factorization.

51315125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605 (or 9595 counting only the distinct ones).

The product of its digits is 750, while the sum is 23.

The square root of 51315125 is about 7163.4576148673. The cubic root of 51315125 is about 371.6052123675.

The spelling of 51315125 in words is "fifty-one million, three hundred fifteen thousand, one hundred twenty-five".