51310443620 has 12 divisors (see below), whose sum is σ = 107751931644. Its totient is φ = 20524177440.

The previous prime is 51310443601. The next prime is 51310443623. The reversal of 51310443620 is 2634401315.

It can be written as a sum of positive squares in 2 ways, for example, as 23708608576 + 27601835044 = 153976^2 + 166138^2 .

It is not an unprimeable number, because it can be changed into a prime (51310443623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282761071 + ... + 1282761110.

It is an arithmetic number, because the mean of its divisors is an integer number (8979327637).

Almost surely, 2^51310443620 is an apocalyptic number.

It is an amenable number.

51310443620 is an abundant number, since it is smaller than the sum of its proper divisors (56441488024).

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

51310443620 is a wasteful number, since it uses less digits than its factorization.

51310443620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565522190 (or 2565522188 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 51310443620 its reverse (2634401315), we get a palindrome (53944844935).

The spelling of 51310443620 in words is "fifty-one billion, three hundred ten million, four hundred forty-three thousand, six hundred twenty".