51101511505500 has 96 divisors (see below), whose sum is σ = 149638929672960. Its totient is φ = 13550940782400.

The previous prime is 51101511505453. The next prime is 51101511505543. The reversal of 51101511505500 is 550511510115.

It is a happy number.

It is a super-2 number, since 2×51101511505500² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94892602 + ... + 95429601.

It is an arithmetic number, because the mean of its divisors is an integer number (1558738850760).

Almost surely, 2^{51101511505500} is an apocalyptic number.

51101511505500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51101511505500 is an abundant number, since it is smaller than the sum of its proper divisors (98537418167460).

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

51101511505500 is a wasteful number, since it uses less digits than its factorization.

51101511505500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190322404 (or 190322392 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 30.

The spelling of 51101511505500 in words is "fifty-one trillion, one hundred one billion, five hundred eleven million, five hundred five thousand, five hundred".