51485305 has 4 divisors (see below), whose sum is σ = 61782372. Its totient is φ = 41188240.

The previous prime is 51485303. The next prime is 51485417. The reversal of 51485305 is 50358415.

51485305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15808576 + 35676729 = 3976^2 + 5973^2 .

It is not a de Polignac number, because 51485305 - 2¹ = 51485303 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51485303) by changing a digit.

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, 5148526 + ... + 5148535.

It is an arithmetic number, because the mean of its divisors is an integer number (15445593).

Almost surely, 2^51485305 is an apocalyptic number.

It is an amenable number.

51485305 is a deficient number, since it is larger than the sum of its proper divisors (10297067).

51485305 is a wasteful number, since it uses less digits than its factorization.

51485305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297066.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 51485305 is about 7175.3261249925. The cubic root of 51485305 is about 372.0155526893.

The spelling of 51485305 in words is "fifty-one million, four hundred eighty-five thousand, three hundred five".