8221163869 has 2 divisors, whose sum is σ = 8221163870. Its totient is φ = 8221163868.

The previous prime is 8221163809. The next prime is 8221163879. The reversal of 8221163869 is 9683611228.

8221163869 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7645403844 + 575760025 = 87438^2 + 23995^2 .

It is a cyclic number.

It is not a de Polignac number, because 8221163869 - 2¹¹ = 8221161821 is a prime.

It is a super-2 number, since 2×8221163869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8221163809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110581934 + 4110581935.

It is an arithmetic number, because the mean of its divisors is an integer number (4110581935).

Almost surely, 2^8221163869 is an apocalyptic number.

It is an amenable number.

8221163869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221163869 is an equidigital number, since it uses as much as digits as its factorization.

8221163869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 8221163869 is about 90670.6339946953. The cubic root of 8221163869 is about 2018.2630453838.

The spelling of 8221163869 in words is "eight billion, two hundred twenty-one million, one hundred sixty-three thousand, eight hundred sixty-nine".