51220441200 has 120 divisors (see below), whose sum is σ = 164542312368. Its totient is φ = 13619978240.

The previous prime is 51220441183. The next prime is 51220441231. The reversal of 51220441200 is 214402215.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363142 + ... + 484058.

Almost surely, 2^51220441200 is an apocalyptic number.

51220441200 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 51220441200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82271156184).

51220441200 is an abundant number, since it is smaller than the sum of its proper divisors (113321871168).

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

51220441200 is a wasteful number, since it uses less digits than its factorization.

51220441200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121291 (or 121280 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 51220441200 its reverse (214402215), we get a palindrome (51434843415).

The spelling of 51220441200 in words is "fifty-one billion, two hundred twenty million, four hundred forty-one thousand, two hundred".