51395473 has 2 divisors, whose sum is σ = 51395474. Its totient is φ = 51395472.

The previous prime is 51395447. The next prime is 51395497. The reversal of 51395473 is 37459315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51365889 + 29584 = 7167^2 + 172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51395473 is a prime.

It is not a weakly prime, because it can be changed into another prime (51395173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25697736 + 25697737.

It is an arithmetic number, because the mean of its divisors is an integer number (25697737).

Almost surely, 2^51395473 is an apocalyptic number.

It is an amenable number.

51395473 is a deficient number, since it is larger than the sum of its proper divisors (1).

51395473 is an equidigital number, since it uses as much as digits as its factorization.

51395473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 51395473 is about 7169.0636069155. The cubic root of 51395473 is about 371.7990614236.

The spelling of 51395473 in words is "fifty-one million, three hundred ninety-five thousand, four hundred seventy-three".