51525517 has 4 divisors (see below), whose sum is σ = 52231420. Its totient is φ = 50819616.

The previous prime is 51525443. The next prime is 51525557. The reversal of 51525517 is 71552515.

51525517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71552515 = 5 ⋅14310503.

It can be written as a sum of positive squares in 2 ways, for example, as 33767721 + 17757796 = 5811^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 51525517 - 2⁷ = 51525389 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 (51525557) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 352842 + ... + 352987.

It is an arithmetic number, because the mean of its divisors is an integer number (13057855).

Almost surely, 2^51525517 is an apocalyptic number.

It is an amenable number.

51525517 is a deficient number, since it is larger than the sum of its proper divisors (705903).

51525517 is an equidigital number, since it uses as much as digits as its factorization.

51525517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705902.

The product of its digits is 8750, while the sum is 31.

The square root of 51525517 is about 7178.1276806699. The cubic root of 51525517 is about 372.1123802950.

The spelling of 51525517 in words is "fifty-one million, five hundred twenty-five thousand, five hundred seventeen".