8522161 has 2 divisors, whose sum is σ = 8522162. Its totient is φ = 8522160.

The previous prime is 8522159. The next prime is 8522197. The reversal of 8522161 is 1612258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8520561 + 1600 = 2919^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 8522161 - 2¹ = 8522159 is a prime.

Together with 8522159, it forms a pair of twin primes.

8522161 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8522141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4261080 + 4261081.

It is an arithmetic number, because the mean of its divisors is an integer number (4261081).

Almost surely, 2^8522161 is an apocalyptic number.

It is an amenable number.

8522161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8522161 is an equidigital number, since it uses as much as digits as its factorization.

8522161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 8522161 is about 2919.2740535962. The cubic root of 8522161 is about 204.2599611016.

Subtracting from 8522161 its reverse (1612258), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8522161 in words is "eight million, five hundred twenty-two thousand, one hundred sixty-one".