51000010500 has 96 divisors (see below), whose sum is σ = 149423863680. Its totient is φ = 13516502400.

The previous prime is 51000010469. The next prime is 51000010547. The reversal of 51000010500 is 501000015.

It is a super-2 number, since 2×51000010500² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140206 + ... + 348794.

It is an arithmetic number, because the mean of its divisors is an integer number (1556498580).

Almost surely, 2^51000010500 is an apocalyptic number.

51000010500 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 51000010500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74711931840).

51000010500 is an abundant number, since it is smaller than the sum of its proper divisors (98423853180).

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

51000010500 is a wasteful number, since it uses less digits than its factorization.

51000010500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208774 (or 208762 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 12.

Adding to 51000010500 its reverse (501000015), we get a palindrome (51501010515).

The spelling of 51000010500 in words is "fifty-one billion, ten thousand, five hundred".