8272218861 has 12 divisors (see below), whose sum is σ = 12008807200. Its totient is φ = 5487098760.

The previous prime is 8272218809. The next prime is 8272218863. The reversal of 8272218861 is 1688122728.

It is a happy number.

8272218861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8272218861 - 2⁹ = 8272218349 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 (8272218863) 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, 2307595 + ... + 2311176.

Almost surely, 2^8272218861 is an apocalyptic number.

It is an amenable number.

8272218861 is a deficient number, since it is larger than the sum of its proper divisors (3736588339).

8272218861 is a wasteful number, since it uses less digits than its factorization.

8272218861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618976 (or 4618973 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 8272218861 is about 90951.7391862300. The cubic root of 8272218861 is about 2022.4323590338.

The spelling of 8272218861 in words is "eight billion, two hundred seventy-two million, two hundred eighteen thousand, eight hundred sixty-one".