51187525 has 6 divisors (see below), whose sum is σ = 63472562. Its totient is φ = 40950000.

The previous prime is 51187483. The next prime is 51187529. The reversal of 51187525 is 52578115.

It can be written as a sum of positive squares in 3 ways, for example, as 16695396 + 34492129 = 4086^2 + 5873^2 .

It is not a de Polignac number, because 51187525 - 2²⁵ = 17633093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51187529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1023726 + ... + 1023775.

Almost surely, 2^51187525 is an apocalyptic number.

It is an amenable number.

51187525 is a deficient number, since it is larger than the sum of its proper divisors (12285037).

51187525 is a wasteful number, since it uses less digits than its factorization.

51187525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047511 (or 2047506 counting only the distinct ones).

The product of its digits is 14000, while the sum is 34.

The square root of 51187525 is about 7154.5457577683. The cubic root of 51187525 is about 371.2969459994.

The spelling of 51187525 in words is "fifty-one million, one hundred eighty-seven thousand, five hundred twenty-five".