39224221 has 8 divisors (see below), whose sum is σ = 39733560. Its totient is φ = 38717952.

The previous prime is 39224201. The next prime is 39224231. The reversal of 39224221 is 12242293.

39224221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13060996 + 26163225 = 3614^2 + 5115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39224221 - 2⁷ = 39224093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39224201) 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 in 7 ways as a sum of consecutive naturals, for example, 34815 + ... + 35923.

It is an arithmetic number, because the mean of its divisors is an integer number (4966695).

Almost surely, 2^39224221 is an apocalyptic number.

It is an amenable number.

39224221 is a deficient number, since it is larger than the sum of its proper divisors (509339).

39224221 is a wasteful number, since it uses less digits than its factorization.

39224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535.

The product of its digits is 1728, while the sum is 25.

The square root of 39224221 is about 6262.9243169625. The cubic root of 39224221 is about 339.7698009249.

The spelling of 39224221 in words is "thirty-nine million, two hundred twenty-four thousand, two hundred twenty-one".