51051010500 has 144 divisors (see below), whose sum is σ = 184056023424. Its totient is φ = 11668795200.

The previous prime is 51051010441. The next prime is 51051010501. The reversal of 51051010500 is 501015015.

51051010500 is a `hidden beast` number, since 51 + 0 + 510 + 105 + 0 + 0 = 666.

It is a super-3 number, since 3×51051010500³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (51051010501) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 778834 + ... + 841833.

Almost surely, 2^51051010500 is an apocalyptic number.

51051010500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51051010500 is an abundant number, since it is smaller than the sum of its proper divisors (133005012924).

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

51051010500 is a wasteful number, since it uses less digits than its factorization.

51051010500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620699 (or 1620684 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

Adding to 51051010500 its reverse (501015015), we get a palindrome (51552025515).

The spelling of 51051010500 in words is "fifty-one billion, fifty-one million, ten thousand, five hundred".