8217481 has 4 divisors (see below), whose sum is σ = 8650000. Its totient is φ = 7784964.

The previous prime is 8217479. The next prime is 8217523. The reversal of 8217481 is 1847128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8217481 - 2¹ = 8217479 is a prime.

It is a super-2 number, since 2×8217481² = 135053987970722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8218481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216231 + ... + 216268.

It is an arithmetic number, because the mean of its divisors is an integer number (2162500).

Almost surely, 2^8217481 is an apocalyptic number.

It is an amenable number.

8217481 is a deficient number, since it is larger than the sum of its proper divisors (432519).

8217481 is a wasteful number, since it uses less digits than its factorization.

8217481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432518.

The product of its digits is 3584, while the sum is 31.

The square root of 8217481 is about 2866.6149026334. The cubic root of 8217481 is about 201.7961623804.

The spelling of 8217481 in words is "eight million, two hundred seventeen thousand, four hundred eighty-one".