51305539 has 2 divisors, whose sum is σ = 51305540. Its totient is φ = 51305538.

The previous prime is 51305521. The next prime is 51305591. The reversal of 51305539 is 93550315.

51305539 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 51305539 - 2¹¹ = 51303491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51305539.

It is not a weakly prime, because it can be changed into another prime (51300539) 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, 25652769 + 25652770.

It is an arithmetic number, because the mean of its divisors is an integer number (25652770).

Almost surely, 2^51305539 is an apocalyptic number.

51305539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51305539 is an equidigital number, since it uses as much as digits as its factorization.

51305539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 51305539 is about 7162.7884933174. The cubic root of 51305539 is about 371.5820715008.

The spelling of 51305539 in words is "fifty-one million, three hundred five thousand, five hundred thirty-nine".