51105105113 has 4 divisors (see below), whose sum is σ = 51205508580. Its totient is φ = 51004701648.

The previous prime is 51105105091. The next prime is 51105105119. The reversal of 51105105113 is 31150150115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33091975744 + 18013129369 = 181912^2 + 134213^2 .

It is a cyclic number.

It is not a de Polignac number, because 51105105113 - 2¹⁴ = 51105088729 is a prime.

It is a super-2 number, since 2×51105105113² (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 (51105105119) 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 3 ways as a sum of consecutive naturals, for example, 50200970 + ... + 50201987.

It is an arithmetic number, because the mean of its divisors is an integer number (12801377145).

Almost surely, 2^51105105113 is an apocalyptic number.

It is an amenable number.

51105105113 is a deficient number, since it is larger than the sum of its proper divisors (100403467).

51105105113 is a wasteful number, since it uses less digits than its factorization.

51105105113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100403466.

The product of its (nonzero) digits is 375, while the sum is 23.

Adding to 51105105113 its reverse (31150150115), we get a palindrome (82255255228).

The spelling of 51105105113 in words is "fifty-one billion, one hundred five million, one hundred five thousand, one hundred thirteen".