51317328 has 40 divisors (see below), whose sum is σ = 139549600. Its totient is φ = 16205184.

The previous prime is 51317293. The next prime is 51317341. The reversal of 51317328 is 82371315.

It is a junction number, because it is equal to n+sod(n) for n = 51317295 and 51317304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27223 + ... + 29046.

It is an arithmetic number, because the mean of its divisors is an integer number (3488740).

Almost surely, 2^51317328 is an apocalyptic number.

It is an amenable number.

51317328 is an abundant number, since it is smaller than the sum of its proper divisors (88232272).

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

51317328 is a wasteful number, since it uses less digits than its factorization.

51317328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56299 (or 56293 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 51317328 is about 7163.6113797442. The cubic root of 51317328 is about 371.6105300627.

The spelling of 51317328 in words is "fifty-one million, three hundred seventeen thousand, three hundred twenty-eight".