51332821280 has 96 divisors (see below), whose sum is σ = 130828146624. Its totient is φ = 18920918016.

The previous prime is 51332821273. The next prime is 51332821339. The reversal of 51332821280 is 8212823315.

51332821280 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 51332821280.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1199939 + ... + 1241981.

It is an arithmetic number, because the mean of its divisors is an integer number (1362793194).

Almost surely, 2^51332821280 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 51332821280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65414073312).

51332821280 is an abundant number, since it is smaller than the sum of its proper divisors (79495325344).

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

51332821280 is a wasteful number, since it uses less digits than its factorization.

51332821280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42658 (or 42650 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 51332821280 in words is "fifty-one billion, three hundred thirty-two million, eight hundred twenty-one thousand, two hundred eighty".