51728733 has 16 divisors (see below), whose sum is σ = 87583360. Its totient is φ = 29559168.

The previous prime is 51728731. The next prime is 51728737. The reversal of 51728733 is 33782715.

51728733 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 51728733 - 2¹ = 51728731 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51728731) 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 15 ways as a sum of consecutive naturals, for example, 136660 + ... + 137037.

It is an arithmetic number, because the mean of its divisors is an integer number (5473960).

Almost surely, 2^51728733 is an apocalyptic number.

It is an amenable number.

51728733 is a deficient number, since it is larger than the sum of its proper divisors (35854627).

51728733 is a wasteful number, since it uses less digits than its factorization.

51728733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273713 (or 273707 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 51728733 is about 7192.2689743919. The cubic root of 51728733 is about 372.6009407690.

The spelling of 51728733 in words is "fifty-one million, seven hundred twenty-eight thousand, seven hundred thirty-three".