8221719 has 8 divisors (see below), whose sum is σ = 11958912. Its totient is φ = 4982840.

The previous prime is 8221669. The next prime is 8221721. The reversal of 8221719 is 9171228.

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 8221719 - 2⁸ = 8221463 is a prime.

It is a super-3 number, since 3×8221719³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

8221719 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221739) 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, 124539 + ... + 124604.

It is an arithmetic number, because the mean of its divisors is an integer number (1494864).

Almost surely, 2^8221719 is an apocalyptic number.

8221719 is a deficient number, since it is larger than the sum of its proper divisors (3737193).

8221719 is a wasteful number, since it uses less digits than its factorization.

8221719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249157.

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

The square root of 8221719 is about 2867.3540067456. The cubic root of 8221719 is about 201.8308471846.

The spelling of 8221719 in words is "eight million, two hundred twenty-one thousand, seven hundred nineteen".