8272412221 has 2 divisors, whose sum is σ = 8272412222. Its totient is φ = 8272412220.

The previous prime is 8272412209. The next prime is 8272412339. The reversal of 8272412221 is 1222142728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5146484121 + 3125928100 = 71739^2 + 55910^2 .

It is a cyclic number.

It is not a de Polignac number, because 8272412221 - 2⁵ = 8272412189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8272412201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4136206110 + 4136206111.

It is an arithmetic number, because the mean of its divisors is an integer number (4136206111).

Almost surely, 2^8272412221 is an apocalyptic number.

It is an amenable number.

8272412221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8272412221 is an equidigital number, since it uses as much as digits as its factorization.

8272412221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 31.

The square root of 8272412221 is about 90952.8021613408. The cubic root of 8272412221 is about 2022.4481167759.

Adding to 8272412221 its reverse (1222142728), we get a palindrome (9494554949).

The spelling of 8272412221 in words is "eight billion, two hundred seventy-two million, four hundred twelve thousand, two hundred twenty-one".