51318880 has 48 divisors (see below), whose sum is σ = 124213824. Its totient is φ = 20024320.

The previous prime is 51318859. The next prime is 51318881. The reversal of 51318880 is 8881315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51318881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2649 + ... + 10471.

It is an arithmetic number, because the mean of its divisors is an integer number (2587788).

Almost surely, 2^51318880 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 51318880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62106912).

51318880 is an abundant number, since it is smaller than the sum of its proper divisors (72894944).

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

51318880 is a wasteful number, since it uses less digits than its factorization.

51318880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7879 (or 7871 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 51318880 is about 7163.7197041760. The cubic root of 51318880 is about 371.6142762549.

The spelling of 51318880 in words is "fifty-one million, three hundred eighteen thousand, eight hundred eighty".