51365584 has 10 divisors (see below), whose sum is σ = 99520850. Its totient is φ = 25682784.

The previous prime is 51365581. The next prime is 51365593. The reversal of 51365584 is 48556315.

51365584 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 only one way, i.e., 29463184 + 21902400 = 5428^2 + 4680^2 .

It is a super-2 number, since 2×51365584² = 5276846439322112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365581) 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 as a sum of consecutive naturals, namely, 1605159 + ... + 1605190.

It is an arithmetic number, because the mean of its divisors is an integer number (9952085).

Almost surely, 2^51365584 is an apocalyptic number.

It is an amenable number.

51365584 is a deficient number, since it is larger than the sum of its proper divisors (48155266).

51365584 is a wasteful number, since it uses less digits than its factorization.

51365584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210357 (or 3210351 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 51365584 is about 7166.9787218883. The cubic root of 51365584 is about 371.7269742897.

Adding to 51365584 its product of digits (72000), we get a square (51437584 = 7172²).

The spelling of 51365584 in words is "fifty-one million, three hundred sixty-five thousand, five hundred eighty-four".