51101479800 has 768 divisors, whose sum is σ = 214507699200. Its totient is φ = 10915430400.

The previous prime is 51101479747. The next prime is 51101479829. The reversal of 51101479800 is 897410115.

51101479800 is a `hidden beast` number, since 5 + 1 + 101 + 479 + 80 + 0 = 666.

It is a super-3 number, since 3×51101479800³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 180570459 + ... + 180570741.

It is an arithmetic number, because the mean of its divisors is an integer number (279306900).

Almost surely, 2^51101479800 is an apocalyptic number.

51101479800 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 51101479800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107253849600).

51101479800 is an abundant number, since it is smaller than the sum of its proper divisors (163406219400).

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

51101479800 is a wasteful number, since it uses less digits than its factorization.

51101479800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

Adding to 51101479800 its reverse (897410115), we get a palindrome (51998889915).

The spelling of 51101479800 in words is "fifty-one billion, one hundred one million, four hundred seventy-nine thousand, eight hundred".