51101105005550 has 48 divisors (see below), whose sum is σ = 96256555733760. Its totient is φ = 20180578260960.

The previous prime is 51101105005549. The next prime is 51101105005567. The reversal of 51101105005550 is 5550050110115.

It is a happy number.

It is a super-2 number, since 2×51101105005550² (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 23 ways as a sum of consecutive naturals, for example, 72435617 + ... + 73137683.

It is an arithmetic number, because the mean of its divisors is an integer number (2005344911120).

Almost surely, 2^{51101105005550} is an apocalyptic number.

51101105005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51101105005550 is a deficient number, since it is larger than the sum of its proper divisors (45155450728210).

51101105005550 is a wasteful number, since it uses less digits than its factorization.

51101105005550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720585 (or 720580 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 29.

Adding to 51101105005550 its reverse (5550050110115), we get a palindrome (56651155115665).

The spelling of 51101105005550 in words is "fifty-one trillion, one hundred one billion, one hundred five million, five thousand, five hundred fifty".