51061520221300 has 72 divisors (see below), whose sum is σ = 116655187652640. Its totient is φ = 19346323075200.

The previous prime is 51061520221267. The next prime is 51061520221337. The reversal of 51061520221300 is 312202516015.

51061520221300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 8843247 + ... + 13428553.

It is an arithmetic number, because the mean of its divisors is an integer number (1620210939620).

Almost surely, 2^{51061520221300} is an apocalyptic number.

51061520221300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51061520221300 is an abundant number, since it is smaller than the sum of its proper divisors (65593667431340).

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

51061520221300 is a wasteful number, since it uses less digits than its factorization.

51061520221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591201 (or 4591194 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 51061520221300 its reverse (312202516015), we get a palindrome (51373722737315).

The spelling of 51061520221300 in words is "fifty-one trillion, sixty-one billion, five hundred twenty million, two hundred twenty-one thousand, three hundred".