51730872 has 32 divisors (see below), whose sum is σ = 130160400. Its totient is φ = 17132544.

The previous prime is 51730853. The next prime is 51730873. The reversal of 51730872 is 27803715.

51730872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730873) 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 7 ways as a sum of consecutive naturals, for example, 3097 + ... + 10632.

Almost surely, 2^51730872 is an apocalyptic number.

It is an amenable number.

51730872 is an abundant number, since it is smaller than the sum of its proper divisors (78429528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51730872 is a wasteful number, since it uses less digits than its factorization.

51730872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13895 (or 13891 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 51730872 is about 7192.4176741900. The cubic root of 51730872 is about 372.6060764217.

The spelling of 51730872 in words is "fifty-one million, seven hundred thirty thousand, eight hundred seventy-two".