51005510105 has 16 divisors (see below), whose sum is σ = 66832129728. Its totient is φ = 37060872000.

The previous prime is 51005510077. The next prime is 51005510107. The reversal of 51005510105 is 50101550015.

It is a happy number.

It is not a de Polignac number, because 51005510105 - 2¹⁰ = 51005509081 is a prime.

It is a super-2 number, since 2×51005510105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51005510107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365006 + ... + 485015.

It is an arithmetic number, because the mean of its divisors is an integer number (4177008108).

Almost surely, 2^51005510105 is an apocalyptic number.

51005510105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51005510105 is a deficient number, since it is larger than the sum of its proper divisors (15826619623).

51005510105 is a wasteful number, since it uses less digits than its factorization.

51005510105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851128.

The product of its (nonzero) digits is 625, while the sum is 23.

The spelling of 51005510105 in words is "fifty-one billion, five million, five hundred ten thousand, one hundred five".