51591325 has 12 divisors (see below), whose sum is σ = 65534868. Its totient is φ = 40265600.

The previous prime is 51591317. The next prime is 51591343. The reversal of 51591325 is 52319515.

51591325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 3663396 + 47927929 = 1914^2 + 6923^2 .

It is not a de Polignac number, because 51591325 - 2³ = 51591317 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 11 ways as a sum of consecutive naturals, for example, 24142 + ... + 26191.

It is an arithmetic number, because the mean of its divisors is an integer number (5461239).

Almost surely, 2^51591325 is an apocalyptic number.

It is an amenable number.

51591325 is a deficient number, since it is larger than the sum of its proper divisors (13943543).

51591325 is a wasteful number, since it uses less digits than its factorization.

51591325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50384 (or 50379 counting only the distinct ones).

The product of its digits is 6750, while the sum is 31.

The square root of 51591325 is about 7182.7101431145. The cubic root of 51591325 is about 372.2707326031.

The spelling of 51591325 in words is "fifty-one million, five hundred ninety-one thousand, three hundred twenty-five".