51100505560550 has 24 divisors (see below), whose sum is σ = 95047576918416. Its totient is φ = 20440065326240.

The previous prime is 51100505560501. The next prime is 51100505560591. The reversal of 51100505560550 is 5506550500115.

It is a happy number.

It is a super-2 number, since 2×51100505560550² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4289759 + ... + 10981941.

It is an arithmetic number, because the mean of its divisors is an integer number (3960315704934).

Almost surely, 2^{51100505560550} is an apocalyptic number.

51100505560550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51100505560550 is a deficient number, since it is larger than the sum of its proper divisors (43947071357866).

51100505560550 is a wasteful number, since it uses less digits than its factorization.

51100505560550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844912 (or 6844907 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 51100505560550 in words is "fifty-one trillion, one hundred billion, five hundred five million, five hundred sixty thousand, five hundred fifty".