51328897 has 2 divisors, whose sum is σ = 51328898. Its totient is φ = 51328896.

The previous prime is 51328883. The next prime is 51328913. The reversal of 51328897 is 79882315.

51328897 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 can be written as a sum of positive squares in only one way, i.e., 28633201 + 22695696 = 5351^2 + 4764^2 .

It is a cyclic number.

It is not a de Polignac number, because 51328897 - 2⁷ = 51328769 is a prime.

It is not a weakly prime, because it can be changed into another prime (51328817) 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, 25664448 + 25664449.

It is an arithmetic number, because the mean of its divisors is an integer number (25664449).

Almost surely, 2^51328897 is an apocalyptic number.

It is an amenable number.

51328897 is a deficient number, since it is larger than the sum of its proper divisors (1).

51328897 is an equidigital number, since it uses as much as digits as its factorization.

51328897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 51328897 is about 7164.4188180201. The cubic root of 51328897 is about 371.6384533091.

It can be divided in two parts, 51328 and 897, that added together give a palindrome (52225).

The spelling of 51328897 in words is "fifty-one million, three hundred twenty-eight thousand, eight hundred ninety-seven".