4328521209 has 6 divisors (see below), whose sum is σ = 6252308426. Its totient is φ = 2885680800.

The previous prime is 4328521189. The next prime is 4328521231. The reversal of 4328521209 is 9021258234.

It is a happy number.

4328521209 is a `hidden beast` number, since 432 + 8 + 5 + 212 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2669995584 + 1658525625 = 51672^2 + 40725^2 .

It is not a de Polignac number, because 4328521209 - 2¹⁶ = 4328455673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4328521279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240473392 + ... + 240473409.

Almost surely, 2^4328521209 is an apocalyptic number.

It is an amenable number.

4328521209 is a deficient number, since it is larger than the sum of its proper divisors (1923787217).

4328521209 is a wasteful number, since it uses less digits than its factorization.

4328521209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480946807 (or 480946804 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 4328521209 is about 65791.4979993616. The cubic root of 4328521209 is about 1629.7207055309.

The spelling of 4328521209 in words is "four billion, three hundred twenty-eight million, five hundred twenty-one thousand, two hundred nine".