51000050100 has 72 divisors (see below), whose sum is σ = 147587741280. Its totient is φ = 13597470080.

The previous prime is 51000050081. The next prime is 51000050107. The reversal of 51000050100 is 105000015.

It is a super-2 number, since 2×51000050100² (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000050107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2028406 + ... + 2053394.

It is an arithmetic number, because the mean of its divisors is an integer number (2049829740).

Almost surely, 2^51000050100 is an apocalyptic number.

51000050100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51000050100 is an abundant number, since it is smaller than the sum of its proper divisors (96587691180).

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

51000050100 is a wasteful number, since it uses less digits than its factorization.

51000050100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31809 (or 31802 counting only the distinct ones).

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

Adding to 51000050100 its reverse (105000015), we get a palindrome (51105050115).

The spelling of 51000050100 in words is "fifty-one billion, fifty thousand, one hundred".