8216161 has 2 divisors, whose sum is σ = 8216162. Its totient is φ = 8216160.

The previous prime is 8216149. The next prime is 8216179. The reversal of 8216161 is 1616128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 2383936 = 2415^2 + 1544^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216161 - 2¹¹ = 8214113 is a prime.

It is not a weakly prime, because it can be changed into another prime (8216101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108080 + 4108081.

It is an arithmetic number, because the mean of its divisors is an integer number (4108081).

Almost surely, 2^8216161 is an apocalyptic number.

It is an amenable number.

8216161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216161 is an equidigital number, since it uses as much as digits as its factorization.

8216161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 8216161 is about 2866.3846566712. The cubic root of 8216161 is about 201.7853567495.

The spelling of 8216161 in words is "eight million, two hundred sixteen thousand, one hundred sixty-one".