51168005 has 18 divisors (see below), whose sum is σ = 71582994. Its totient is φ = 35009856.

The previous prime is 51167999. The next prime is 51168017. The reversal of 51168005 is 50086115.

It can be written as a sum of positive squares in 3 ways, for example, as 22791076 + 28376929 = 4774^2 + 5327^2 .

It is not a de Polignac number, because 51168005 - 2¹⁸ = 50905861 is a prime.

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 17 ways as a sum of consecutive naturals, for example, 111737 + ... + 112193.

It is an arithmetic number, because the mean of its divisors is an integer number (3976833).

Almost surely, 2^51168005 is an apocalyptic number.

It is an amenable number.

51168005 is a deficient number, since it is larger than the sum of its proper divisors (20414989).

51168005 is an frugal number, since it uses more digits than its factorization.

51168005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 51168005 is about 7153.1814600218. The cubic root of 51168005 is about 371.2497428454.

The spelling of 51168005 in words is "fifty-one million, one hundred sixty-eight thousand, five".