4272216209 has 8 divisors (see below), whose sum is σ = 4353794280. Its totient is φ = 4190674176.

The previous prime is 4272216197. The next prime is 4272216233. The reversal of 4272216209 is 9026122724.

It can be written as a sum of positive squares in 4 ways, for example, as 2667412609 + 1604803600 = 51647^2 + 40060^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4272216209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4272212209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455879 + ... + 465155.

It is an arithmetic number, because the mean of its divisors is an integer number (544224285).

Almost surely, 2^4272216209 is an apocalyptic number.

It is an amenable number.

4272216209 is a deficient number, since it is larger than the sum of its proper divisors (81578071).

4272216209 is an equidigital number, since it uses as much as digits as its factorization.

4272216209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18019.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 4272216209 is about 65362.1925045358. The cubic root of 4272216209 is about 1622.6234241101.

The spelling of 4272216209 in words is "four billion, two hundred seventy-two million, two hundred sixteen thousand, two hundred nine".