51845539 has 2 divisors, whose sum is σ = 51845540. Its totient is φ = 51845538.

The previous prime is 51845537. The next prime is 51845543. The reversal of 51845539 is 93554815.

51845539 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 51845539 - 2¹ = 51845537 is a prime.

Together with 51845537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51845537) 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, 25922769 + 25922770.

It is an arithmetic number, because the mean of its divisors is an integer number (25922770).

Almost surely, 2^51845539 is an apocalyptic number.

51845539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51845539 is an equidigital number, since it uses as much as digits as its factorization.

51845539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 40.

The square root of 51845539 is about 7200.3846425035. The cubic root of 51845539 is about 372.8811803039.

The spelling of 51845539 in words is "fifty-one million, eight hundred forty-five thousand, five hundred thirty-nine".