51745559 has 2 divisors, whose sum is σ = 51745560. Its totient is φ = 51745558.

The previous prime is 51745549. The next prime is 51745571. The reversal of 51745559 is 95554715.

51745559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51745559 - 2²⁰ = 50696983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51745549) 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, 25872779 + 25872780.

It is an arithmetic number, because the mean of its divisors is an integer number (25872780).

Almost surely, 2^51745559 is an apocalyptic number.

51745559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51745559 is an equidigital number, since it uses as much as digits as its factorization.

51745559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157500, while the sum is 41.

The square root of 51745559 is about 7193.4386075089. The cubic root of 51745559 is about 372.6413354937.

The spelling of 51745559 in words is "fifty-one million, seven hundred forty-five thousand, five hundred fifty-nine".