51310345500 has 288 divisors, whose sum is σ = 170847156480. Its totient is φ = 12927600000.

The previous prime is 51310345451. The next prime is 51310345571. The reversal of 51310345500 is 554301315.

51310345500 is a `hidden beast` number, since 5 + 1 + 3 + 103 + 4 + 550 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48819975 + ... + 48821025.

Almost surely, 2^51310345500 is an apocalyptic number.

51310345500 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 51310345500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85423578240).

51310345500 is an abundant number, since it is smaller than the sum of its proper divisors (119536810980).

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

51310345500 is a wasteful number, since it uses less digits than its factorization.

51310345500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 51310345500 its reverse (554301315), we get a palindrome (51864646815).

The spelling of 51310345500 in words is "fifty-one billion, three hundred ten million, three hundred forty-five thousand, five hundred".