51005000055105 has 40 divisors (see below), whose sum is σ = 91433147945832. Its totient is φ = 27202082764032.

The previous prime is 51005000055101. The next prime is 51005000055131. The reversal of 51005000055105 is 50155000050015.

51005000055105 is a `hidden beast` number, since 5 + 1 + 0 + 0 + 500 + 0 + 0 + 55 + 105 = 666.

51005000055105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 842740524081 + 50162259531024 = 918009^2 + 7082532^2 .

It is not a de Polignac number, because 51005000055105 - 2² = 51005000055101 is a prime.

It is a super-2 number, since 2×51005000055105² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51005000055101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17875899 + ... + 20531871.

Almost surely, 2^{51005000055105} is an apocalyptic number.

It is an amenable number.

51005000055105 is a deficient number, since it is larger than the sum of its proper divisors (40428147890727).

51005000055105 is a wasteful number, since it uses less digits than its factorization.

51005000055105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703407 (or 2703398 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The spelling of 51005000055105 in words is "fifty-one trillion, five billion, fifty-five thousand, one hundred five".