51550344120 has 128 divisors (see below), whose sum is σ = 168825565440. Its totient is φ = 12488509440.

The previous prime is 51550344047. The next prime is 51550344161. The reversal of 51550344120 is 2144305515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2037387 + ... + 2062533.

It is an arithmetic number, because the mean of its divisors is an integer number (1318949730).

Almost surely, 2^51550344120 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 51550344120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84412782720).

51550344120 is an abundant number, since it is smaller than the sum of its proper divisors (117275221320).

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

51550344120 is a wasteful number, since it uses less digits than its factorization.

51550344120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26725 (or 26721 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 51550344120 its reverse (2144305515), we get a palindrome (53694649635).

The spelling of 51550344120 in words is "fifty-one billion, five hundred fifty million, three hundred forty-four thousand, one hundred twenty".