8221315 has 8 divisors (see below), whose sum is σ = 9953568. Its totient is φ = 6518400.

The previous prime is 8221313. The next prime is 8221321. The reversal of 8221315 is 5131228.

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

It is not a de Polignac number, because 8221315 - 2¹ = 8221313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221313) 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 7 ways as a sum of consecutive naturals, for example, 6711 + ... + 7840.

It is an arithmetic number, because the mean of its divisors is an integer number (1244196).

Almost surely, 2^8221315 is an apocalyptic number.

8221315 is a deficient number, since it is larger than the sum of its proper divisors (1732253).

8221315 is a wasteful number, since it uses less digits than its factorization.

8221315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14669.

The product of its digits is 480, while the sum is 22.

The square root of 8221315 is about 2867.2835576552. The cubic root of 8221315 is about 201.8275412661.

It can be divided in two parts, 82213 and 15, that added together give a palindrome (82228).

The spelling of 8221315 in words is "eight million, two hundred twenty-one thousand, three hundred fifteen".