51320050500 has 192 divisors, whose sum is σ = 163341674496. Its totient is φ = 12464640000.

The previous prime is 51320050447. The next prime is 51320050511. The reversal of 51320050500 is 505002315.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 758040 + ... + 822960.

It is an arithmetic number, because the mean of its divisors is an integer number (850737888).

Almost surely, 2^51320050500 is an apocalyptic number.

51320050500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51320050500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81670837248).

51320050500 is an abundant number, since it is smaller than the sum of its proper divisors (112021623996).

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

51320050500 is a wasteful number, since it uses less digits than its factorization.

51320050500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64991 (or 64979 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

Adding to 51320050500 its reverse (505002315), we get a palindrome (51825052815).

The spelling of 51320050500 in words is "fifty-one billion, three hundred twenty million, fifty thousand, five hundred".