8206181 has 2 divisors, whose sum is σ = 8206182. Its totient is φ = 8206180.

The previous prime is 8206171. The next prime is 8206183. The reversal of 8206181 is 1816028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5597956 + 2608225 = 2366^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 8206181 - 2⁶ = 8206117 is a prime.

It is a super-2 number, since 2×8206181² = 134682813209522, which contains 22 as substring.

Together with 8206183, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8206181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8206183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4103090 + 4103091.

It is an arithmetic number, because the mean of its divisors is an integer number (4103091).

Almost surely, 2^8206181 is an apocalyptic number.

It is an amenable number.

8206181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8206181 is an equidigital number, since it uses as much as digits as its factorization.

8206181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 8206181 is about 2864.6432587671. The cubic root of 8206181 is about 201.7036221539.

The spelling of 8206181 in words is "eight million, two hundred six thousand, one hundred eighty-one".