51323120512 has 48 divisors (see below), whose sum is σ = 102821691600. Its totient is φ = 25517698560.

The previous prime is 51323120419. The next prime is 51323120531. The reversal of 51323120512 is 21502132315.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 4187289 + ... + 4199527.

It is an arithmetic number, because the mean of its divisors is an integer number (2142118575).

Almost surely, 2^51323120512 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 51323120512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51410845800).

51323120512 is an abundant number, since it is smaller than the sum of its proper divisors (51498571088).

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

51323120512 is an equidigital number, since it uses as much as digits as its factorization.

51323120512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12615 (or 12422 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 51323120512 its reverse (21502132315), we get a palindrome (72825252827).

The spelling of 51323120512 in words is "fifty-one billion, three hundred twenty-three million, one hundred twenty thousand, five hundred twelve".