8151217 has 2 divisors, whose sum is σ = 8151218. Its totient is φ = 8151216.

The previous prime is 8151203. The next prime is 8151229. The reversal of 8151217 is 7121518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5934096 + 2217121 = 2436^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 8151217 - 2¹⁹ = 7626929 is a prime.

It is equal to p₅₄₉₂₄₁ and since 8151217 and 549241 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 8151191 and 8151200.

It is not a weakly prime, because it can be changed into another prime (8151917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4075608 + 4075609.

It is an arithmetic number, because the mean of its divisors is an integer number (4075609).

Almost surely, 2^8151217 is an apocalyptic number.

It is an amenable number.

8151217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151217 is an equidigital number, since it uses as much as digits as its factorization.

8151217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 8151217 is about 2855.0336250209. The cubic root of 8151217 is about 201.2522842224.

The spelling of 8151217 in words is "eight million, one hundred fifty-one thousand, two hundred seventeen".