51324121320 has 128 divisors (see below), whose sum is σ = 164613047040. Its totient is φ = 12756234240.

The previous prime is 51324121313. The next prime is 51324121333. The reversal of 51324121320 is 2312142315.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 87990 + ... + 332250.

It is an arithmetic number, because the mean of its divisors is an integer number (1286039430).

Almost surely, 2^51324121320 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 51324121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82306523520).

51324121320 is an abundant number, since it is smaller than the sum of its proper divisors (113288925720).

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

51324121320 is a wasteful number, since it uses less digits than its factorization.

51324121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244395 (or 244391 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 51324121320 its reverse (2312142315), we get a palindrome (53636263635).

The spelling of 51324121320 in words is "fifty-one billion, three hundred twenty-four million, one hundred twenty-one thousand, three hundred twenty".