51100500550 has 48 divisors (see below), whose sum is σ = 104714284464. Its totient is φ = 18398000000.

The previous prime is 51100500527. The next prime is 51100500557. The reversal of 51100500550 is 5500500115.

It is a super-2 number, since 2×51100500550² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100500557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404401 + ... + 515500.

It is an arithmetic number, because the mean of its divisors is an integer number (2181547593).

Almost surely, 2^51100500550 is an apocalyptic number.

51100500550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51100500550 is an abundant number, since it is smaller than the sum of its proper divisors (53613783914).

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

51100500550 is a wasteful number, since it uses less digits than its factorization.

51100500550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920025 (or 920020 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The spelling of 51100500550 in words is "fifty-one billion, one hundred million, five hundred thousand, five hundred fifty".