51538872 has 96 divisors (see below), whose sum is σ = 161608320. Its totient is φ = 13306560.

The previous prime is 51538859. The next prime is 51538873. The reversal of 51538872 is 27883515.

51538872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51538872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538873) 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 23 ways as a sum of consecutive naturals, for example, 308533 + ... + 308699.

It is an arithmetic number, because the mean of its divisors is an integer number (1683420).

Almost surely, 2^51538872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51538872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80804160).

51538872 is an abundant number, since it is smaller than the sum of its proper divisors (110069448).

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

51538872 is a wasteful number, since it uses less digits than its factorization.

51538872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 190 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 51538872 is about 7179.0578769084. The cubic root of 51538872 is about 372.1445270308.

The spelling of 51538872 in words is "fifty-one million, five hundred thirty-eight thousand, eight hundred seventy-two".