51839725 has 36 divisors (see below), whose sum is σ = 76089376. Its totient is φ = 34302240.

The previous prime is 51839717. The next prime is 51839743. The reversal of 51839725 is 52793815.

51839725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51839725 - 2³ = 51839717 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 35 ways as a sum of consecutive naturals, for example, 624534 + ... + 624616.

Almost surely, 2^51839725 is an apocalyptic number.

It is an amenable number.

51839725 is a deficient number, since it is larger than the sum of its proper divisors (24249651).

51839725 is an equidigital number, since it uses as much as digits as its factorization.

51839725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 138 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 51839725 is about 7199.9809027525. The cubic root of 51839725 is about 372.8672413854.

The spelling of 51839725 in words is "fifty-one million, eight hundred thirty-nine thousand, seven hundred twenty-five".