8221881 has 8 divisors (see below), whose sum is σ = 11258944. Its totient is φ = 5333040.

The previous prime is 8221859. The next prime is 8221891. The reversal of 8221881 is 1881228.

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

It is not a de Polignac number, because 8221881 - 2⁷ = 8221753 is a prime.

It is a super-2 number, since 2×8221881² = 135198654356322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8221831) 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, 36925 + ... + 37146.

It is an arithmetic number, because the mean of its divisors is an integer number (1407368).

Almost surely, 2^8221881 is an apocalyptic number.

It is an amenable number.

8221881 is a deficient number, since it is larger than the sum of its proper divisors (3037063).

8221881 is a wasteful number, since it uses less digits than its factorization.

8221881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74111.

The product of its digits is 2048, while the sum is 30.

The square root of 8221881 is about 2867.3822556471. The cubic root of 8221881 is about 201.8321727947.

The spelling of 8221881 in words is "eight million, two hundred twenty-one thousand, eight hundred eighty-one".