51043164500 has 24 divisors (see below), whose sum is σ = 111478272360. Its totient is φ = 20417265600.

The previous prime is 51043164493. The next prime is 51043164511. The reversal of 51043164500 is 546134015.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15763806916 + 35279357584 = 125554^2 + 187828^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51042665 + ... + 51043664.

It is an arithmetic number, because the mean of its divisors is an integer number (4644928015).

Almost surely, 2^51043164500 is an apocalyptic number.

51043164500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51043164500 is an abundant number, since it is smaller than the sum of its proper divisors (60435107860).

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

51043164500 is a wasteful number, since it uses less digits than its factorization.

51043164500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102086348 (or 102086336 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 51043164500 its reverse (546134015), we get a palindrome (51589298515).

The spelling of 51043164500 in words is "fifty-one billion, forty-three million, one hundred sixty-four thousand, five hundred".