65225509 has 2 divisors, whose sum is σ = 65225510. Its totient is φ = 65225508.

The previous prime is 65225483. The next prime is 65225513. The reversal of 65225509 is 90552256.

65225509 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., 52157284 + 13068225 = 7222^2 + 3615^2 .

It is a cyclic number.

It is not a de Polignac number, because 65225509 - 2⁹ = 65224997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65225569) 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, 32612754 + 32612755.

It is an arithmetic number, because the mean of its divisors is an integer number (32612755).

Almost surely, 2^65225509 is an apocalyptic number.

It is an amenable number.

65225509 is a deficient number, since it is larger than the sum of its proper divisors (1).

65225509 is an equidigital number, since it uses as much as digits as its factorization.

65225509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 65225509 is about 8076.2311135826. The cubic root of 65225509 is about 402.5370185723.

The spelling of 65225509 in words is "sixty-five million, two hundred twenty-five thousand, five hundred nine".