8722219 has 4 divisors (see below), whose sum is σ = 9515160. Its totient is φ = 7929280.

The previous prime is 8722211. The next prime is 8722223. The reversal of 8722219 is 9122278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8722219 - 2³ = 8722211 is a prime.

It is a super-2 number, since 2×8722219² = 152154208567922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8722211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396454 + ... + 396475.

It is an arithmetic number, because the mean of its divisors is an integer number (2378790).

Almost surely, 2^8722219 is an apocalyptic number.

8722219 is a deficient number, since it is larger than the sum of its proper divisors (792941).

8722219 is a wasteful number, since it uses less digits than its factorization.

8722219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792940.

The product of its digits is 4032, while the sum is 31.

The square root of 8722219 is about 2953.3403122566. The cubic root of 8722219 is about 205.8459510624.

It can be divided in two parts, 8 and 722219, that added together give a palindrome (722227).

The spelling of 8722219 in words is "eight million, seven hundred twenty-two thousand, two hundred nineteen".