51005807 has 2 divisors, whose sum is σ = 51005808. Its totient is φ = 51005806.

The previous prime is 51005791. The next prime is 51005813. The reversal of 51005807 is 70850015.

51005807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51005807 - 2⁴ = 51005791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51005887) 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 as a sum of consecutive naturals, namely, 25502903 + 25502904.

It is an arithmetic number, because the mean of its divisors is an integer number (25502904).

Almost surely, 2^51005807 is an apocalyptic number.

51005807 is a deficient number, since it is larger than the sum of its proper divisors (1).

51005807 is an equidigital number, since it uses as much as digits as its factorization.

51005807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 51005807 is about 7141.8349882926. The cubic root of 51005807 is about 370.8570514589.

The spelling of 51005807 in words is "fifty-one million, five thousand, eight hundred seven".