51105305 has 8 divisors (see below), whose sum is σ = 61389312. Its totient is φ = 40842288.

The previous prime is 51105289. The next prime is 51105317. The reversal of 51105305 is 50350115.

It is a happy number.

51105305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51105305 - 2⁴ = 51105289 is a prime.

It is a super-2 number, since 2×51105305² = 5223504398286050, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 734 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (7673664).

Almost surely, 2^51105305 is an apocalyptic number.

It is an amenable number.

51105305 is a deficient number, since it is larger than the sum of its proper divisors (10284007).

51105305 is a wasteful number, since it uses less digits than its factorization.

51105305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10495.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 51105305 is about 7148.7974513200. The cubic root of 51105305 is about 371.0980407991.

The spelling of 51105305 in words is "fifty-one million, one hundred five thousand, three hundred five".