51747129 has 12 divisors (see below), whose sum is σ = 85423936. Its totient is φ = 29569752.

The previous prime is 51747077. The next prime is 51747139. The reversal of 51747129 is 92174715.

It is a happy number.

51747129 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 51747129 - 2⁸ = 51746873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51747093 and 51747102.

It is not an unprimeable number, because it can be changed into a prime (51747139) 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 11 ways as a sum of consecutive naturals, for example, 410629 + ... + 410754.

Almost surely, 2^51747129 is an apocalyptic number.

It is an amenable number.

51747129 is a deficient number, since it is larger than the sum of its proper divisors (33676807).

51747129 is a wasteful number, since it uses less digits than its factorization.

51747129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821396 (or 821393 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 51747129 is about 7193.5477339071. The cubic root of 51747129 is about 372.6451041971.

The spelling of 51747129 in words is "fifty-one million, seven hundred forty-seven thousand, one hundred twenty-nine".