51302120000 has 140 divisors (see below), whose sum is σ = 128141669040. Its totient is φ = 20371008000.

The previous prime is 51302119997. The next prime is 51302120033. The reversal of 51302120000 is 2120315.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5555387 + ... + 5564613.

It is an arithmetic number, because the mean of its divisors is an integer number (915297636).

Almost surely, 2^51302120000 is an apocalyptic number.

51302120000 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 51302120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64070834520).

51302120000 is an abundant number, since it is smaller than the sum of its proper divisors (76839549040).

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

51302120000 is an equidigital number, since it uses as much as digits as its factorization.

51302120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9398 (or 9373 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 51302120000 its reverse (2120315), we get a palindrome (51304240315).

The spelling of 51302120000 in words is "fifty-one billion, three hundred two million, one hundred twenty thousand".