8203209217 has 12 divisors (see below), whose sum is σ = 9673232196. Its totient is φ = 6934999680.

The previous prime is 8203209211. The next prime is 8203209221. The reversal of 8203209217 is 7129023028.

It can be written as a sum of positive squares in 2 ways, for example, as 2584807281 + 5618401936 = 50841^2 + 74956^2 .

It is not a de Polignac number, because 8203209217 - 2⁷ = 8203209089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8203209211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1143084 + ... + 1150237.

It is an arithmetic number, because the mean of its divisors is an integer number (806102683).

Almost surely, 2^8203209217 is an apocalyptic number.

It is an amenable number.

8203209217 is a deficient number, since it is larger than the sum of its proper divisors (1470022979).

8203209217 is a wasteful number, since it uses less digits than its factorization.

8203209217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293408 (or 2293401 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 8203209217 is about 90571.5695845004. The cubic root of 8203209217 is about 2016.7927092529.

The spelling of 8203209217 in words is "eight billion, two hundred three million, two hundred nine thousand, two hundred seventeen".