8221197 has 16 divisors (see below), whose sum is σ = 11370240. Its totient is φ = 5280000.

The previous prime is 8221177. The next prime is 8221211. The reversal of 8221197 is 7911228.

It is not a de Polignac number, because 8221197 - 2⁷ = 8221069 is a prime.

It is a super-2 number, since 2×8221197² = 135176160225618, which contains 22 as substring.

It is an Ulam number.

8221197 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221177) 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 15 ways as a sum of consecutive naturals, for example, 10572 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (710640).

Almost surely, 2^8221197 is an apocalyptic number.

It is an amenable number.

8221197 is a deficient number, since it is larger than the sum of its proper divisors (3149043).

8221197 is a wasteful number, since it uses less digits than its factorization.

8221197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its digits is 2016, while the sum is 30.

The square root of 8221197 is about 2867.2629806141. The cubic root of 8221197 is about 201.8265756556.

The spelling of 8221197 in words is "eight million, two hundred twenty-one thousand, one hundred ninety-seven".