8256217 has 8 divisors (see below), whose sum is σ = 8525376. Its totient is φ = 7989552.

The previous prime is 8256197. The next prime is 8256221. The reversal of 8256217 is 7126528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8256217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8256257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7908 + ... + 8890.

It is an arithmetic number, because the mean of its divisors is an integer number (1065672).

Almost surely, 2^8256217 is an apocalyptic number.

It is an amenable number.

8256217 is a deficient number, since it is larger than the sum of its proper divisors (269159).

8256217 is a wasteful number, since it uses less digits than its factorization.

8256217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 6720, while the sum is 31.

The square root of 8256217 is about 2873.3633602453. The cubic root of 8256217 is about 202.1127446287.

The spelling of 8256217 in words is "eight million, two hundred fifty-six thousand, two hundred seventeen".