82224509 has 2 divisors, whose sum is σ = 82224510. Its totient is φ = 82224508.

The previous prime is 82224503. The next prime is 82224521. The reversal of 82224509 is 90542228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50268100 + 31956409 = 7090^2 + 5653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82224509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82224503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41112254 + 41112255.

It is an arithmetic number, because the mean of its divisors is an integer number (41112255).

Almost surely, 2^82224509 is an apocalyptic number.

It is an amenable number.

82224509 is a deficient number, since it is larger than the sum of its proper divisors (1).

82224509 is an equidigital number, since it uses as much as digits as its factorization.

82224509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 82224509 is about 9067.7731003814. The cubic root of 82224509 is about 434.8442812520.

The spelling of 82224509 in words is "eighty-two million, two hundred twenty-four thousand, five hundred nine".