39643225 has 12 divisors (see below), whose sum is σ = 49596156. Its totient is φ = 31431680.

The previous prime is 39643223. The next prime is 39643249. The reversal of 39643225 is 52234693.

39643225 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 6 ways, for example, as 15936064 + 23707161 = 3992^2 + 4869^2 .

It is not a de Polignac number, because 39643225 - 2¹ = 39643223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39643223) 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 11 ways as a sum of consecutive naturals, for example, 4192 + ... + 9841.

It is an arithmetic number, because the mean of its divisors is an integer number (4133013).

Almost surely, 2^39643225 is an apocalyptic number.

It is an amenable number.

39643225 is a deficient number, since it is larger than the sum of its proper divisors (9952931).

39643225 is a wasteful number, since it uses less digits than its factorization.

39643225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14156 (or 14151 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 39643225 is about 6296.2866040230. The cubic root of 39643225 is about 340.9753567615.

The spelling of 39643225 in words is "thirty-nine million, six hundred forty-three thousand, two hundred twenty-five".