51565006105 has 4 divisors (see below), whose sum is σ = 61878007332. Its totient is φ = 41252004880.

The previous prime is 51565006063. The next prime is 51565006133. The reversal of 51565006105 is 50160056515.

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 34786726144 + 16778279961 = 186512^2 + 129531^2 .

It is not a de Polignac number, because 51565006105 - 2¹⁹ = 51564481817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5156500606 + ... + 5156500615.

It is an arithmetic number, because the mean of its divisors is an integer number (15469501833).

Almost surely, 2^51565006105 is an apocalyptic number.

It is an amenable number.

51565006105 is a deficient number, since it is larger than the sum of its proper divisors (10313001227).

51565006105 is a wasteful number, since it uses less digits than its factorization.

51565006105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10313001226.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 51565006105 in words is "fifty-one billion, five hundred sixty-five million, six thousand, one hundred five".