8229181 has 2 divisors, whose sum is σ = 8229182. Its totient is φ = 8229180.

The previous prime is 8229163. The next prime is 8229187. The reversal of 8229181 is 1819228.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 1285956 = 2635^2 + 1134^2 .

It is a cyclic number.

It is not a de Polignac number, because 8229181 - 2⁵ = 8229149 is a prime.

It is a super-2 number, since 2×8229181² = 135438839861522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8229187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4114590 + 4114591.

It is an arithmetic number, because the mean of its divisors is an integer number (4114591).

Almost surely, 2^8229181 is an apocalyptic number.

It is an amenable number.

8229181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8229181 is an equidigital number, since it uses as much as digits as its factorization.

8229181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 31.

The square root of 8229181 is about 2868.6549112781. The cubic root of 8229181 is about 201.8918890170.

The spelling of 8229181 in words is "eight million, two hundred twenty-nine thousand, one hundred eighty-one".