51000112000 has 64 divisors (see below), whose sum is σ = 126799068240. Its totient is φ = 20400038400.

The previous prime is 51000111997. The next prime is 51000112043. The reversal of 51000112000 is 21100015.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×51000112000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577754 + ... + 1609753.

Almost surely, 2^51000112000 is an apocalyptic number.

51000112000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51000112000 is an abundant number, since it is smaller than the sum of its proper divisors (75798956240).

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

51000112000 is an equidigital number, since it uses as much as digits as its factorization.

51000112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187536 (or 3187514 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

Adding to 51000112000 its reverse (21100015), we get a palindrome (51021212015).

The spelling of 51000112000 in words is "fifty-one billion, one hundred twelve thousand".