51021112530500 has 72 divisors (see below), whose sum is σ = 129622780811160. Its totient is φ = 17492952859200.

The previous prime is 51021112530497. The next prime is 51021112530541. The reversal of 51021112530500 is 503521112015.

51021112530500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 43111877956 + 50978000652544 = 207634^2 + 7139888^2 .

It is a super-2 number, since 2×51021112530500² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51021112530500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1041222695 + ... + 1041271694.

It is an arithmetic number, because the mean of its divisors is an integer number (1800316400155).

Almost surely, 2^{51021112530500} is an apocalyptic number.

51021112530500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51021112530500 is an abundant number, since it is smaller than the sum of its proper divisors (78601668280660).

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

51021112530500 is a wasteful number, since it uses less digits than its factorization.

51021112530500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082494422 (or 2082494403 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 51021112530500 its reverse (503521112015), we get a palindrome (51524633642515).

The spelling of 51021112530500 in words is "fifty-one trillion, twenty-one billion, one hundred twelve million, five hundred thirty thousand, five hundred".