51329857 has 2 divisors, whose sum is σ = 51329858. Its totient is φ = 51329856.

The previous prime is 51329843. The next prime is 51329869. The reversal of 51329857 is 75892315.

51329857 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 can be written as a sum of positive squares in only one way, i.e., 50466816 + 863041 = 7104^2 + 929^2 .

It is a cyclic number.

It is not a de Polignac number, because 51329857 - 2¹⁵ = 51297089 is a prime.

It is not a weakly prime, because it can be changed into another prime (51329807) 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, 25664928 + 25664929.

It is an arithmetic number, because the mean of its divisors is an integer number (25664929).

Almost surely, 2^51329857 is an apocalyptic number.

It is an amenable number.

51329857 is a deficient number, since it is larger than the sum of its proper divisors (1).

51329857 is an equidigital number, since it uses as much as digits as its factorization.

51329857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 51329857 is about 7164.4858154651. The cubic root of 51329857 is about 371.6407702022.

The spelling of 51329857 in words is "fifty-one million, three hundred twenty-nine thousand, eight hundred fifty-seven".