51030000000 has 896 divisors, whose sum is σ = 217745536320. Its totient is φ = 11664000000.

The previous prime is 51029999983. The next prime is 51030000013. The reversal of 51030000000 is 3015.

It is a tau number, because it is divible by the number of its divisors (896).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 7289999997 + ... + 7290000003.

Almost surely, 2^51030000000 is an apocalyptic number.

51030000000 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 51030000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108872768160).

51030000000 is an abundant number, since it is smaller than the sum of its proper divisors (166715536320).

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

51030000000 is an frugal number, since it uses more digits than its factorization.

51030000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

Adding to 51030000000 its reverse (3015), we get a palindrome (51030003015).

The spelling of 51030000000 in words is "fifty-one billion, thirty million", and thus it is an aban number and an uban number.