51251525 has 24 divisors (see below), whose sum is σ = 70662144. Its totient is φ = 36619200.

The previous prime is 51251491. The next prime is 51251527. The reversal of 51251525 is 52515215.

It is not a de Polignac number, because 51251525 - 2⁸ = 51251269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51251494 and 51251503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51251527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7532 + ... + 12618.

It is an arithmetic number, because the mean of its divisors is an integer number (2944256).

Almost surely, 2^51251525 is an apocalyptic number.

It is an amenable number.

51251525 is a deficient number, since it is larger than the sum of its proper divisors (19410619).

51251525 is a wasteful number, since it uses less digits than its factorization.

51251525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141 (or 5136 counting only the distinct ones).

The product of its digits is 2500, while the sum is 26.

The square root of 51251525 is about 7159.0170414660. The cubic root of 51251525 is about 371.4516263162.

The spelling of 51251525 in words is "fifty-one million, two hundred fifty-one thousand, five hundred twenty-five".