51315871 has 2 divisors, whose sum is σ = 51315872. Its totient is φ = 51315870.

The previous prime is 51315841. The next prime is 51315919. The reversal of 51315871 is 17851315.

51315871 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 51315871 - 2⁷ = 51315743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51315841) 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, 25657935 + 25657936.

It is an arithmetic number, because the mean of its divisors is an integer number (25657936).

Almost surely, 2^51315871 is an apocalyptic number.

51315871 is a deficient number, since it is larger than the sum of its proper divisors (1).

51315871 is an equidigital number, since it uses as much as digits as its factorization.

51315871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 31.

The square root of 51315871 is about 7163.5096845052. The cubic root of 51315871 is about 371.6070131111.

It can be divided in two parts, 513 and 15871, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 51315871 in words is "fifty-one million, three hundred fifteen thousand, eight hundred seventy-one".