8221447 has 8 divisors (see below), whose sum is σ = 8890560. Its totient is φ = 7557600.

The previous prime is 8221439. The next prime is 8221453. The reversal of 8221447 is 7441228.

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

It is a cyclic number.

It is not a de Polignac number, because 8221447 - 2³ = 8221439 is a prime.

It is a Duffinian number.

8221447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322 + ... + 4672.

It is an arithmetic number, because the mean of its divisors is an integer number (1111320).

Almost surely, 2^8221447 is an apocalyptic number.

8221447 is a deficient number, since it is larger than the sum of its proper divisors (669113).

8221447 is a wasteful number, since it uses less digits than its factorization.

8221447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633.

The product of its digits is 3584, while the sum is 28.

The square root of 8221447 is about 2867.3065758652. The cubic root of 8221447 is about 201.8286214296.

It can be divided in two parts, 8221 and 447, that added together give a palindrome (8668).

The spelling of 8221447 in words is "eight million, two hundred twenty-one thousand, four hundred forty-seven".