40224209 has 2 divisors, whose sum is σ = 40224210. Its totient is φ = 40224208.

The previous prime is 40224203. The next prime is 40224211. The reversal of 40224209 is 90242204.

40224209 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., 40043584 + 180625 = 6328^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40224209 is a prime.

Together with 40224211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40224203) 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, 20112104 + 20112105.

It is an arithmetic number, because the mean of its divisors is an integer number (20112105).

Almost surely, 2^40224209 is an apocalyptic number.

It is an amenable number.

40224209 is a deficient number, since it is larger than the sum of its proper divisors (1).

40224209 is an equidigital number, since it uses as much as digits as its factorization.

40224209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40224209 is about 6342.2558289618. The cubic root of 40224209 is about 342.6329858130.

The spelling of 40224209 in words is "forty million, two hundred twenty-four thousand, two hundred nine".