8722181 has 8 divisors (see below), whose sum is σ = 9426144. Its totient is φ = 8022960.

The previous prime is 8722171. The next prime is 8722187. The reversal of 8722181 is 1812278.

8722181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8722181 - 2⁶ = 8722117 is a prime.

It is a super-2 number, since 2×8722181² = 152152882793522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722187) 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, 3290 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (1178268).

Almost surely, 2^8722181 is an apocalyptic number.

It is an amenable number.

8722181 is a deficient number, since it is larger than the sum of its proper divisors (703963).

8722181 is a wasteful number, since it uses less digits than its factorization.

8722181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371.

The product of its digits is 1792, while the sum is 29.

The square root of 8722181 is about 2953.3338788562. Note that the first 3 decimals coincide. The cubic root of 8722181 is about 205.8456521263.

Subtracting from 8722181 its reverse (1812278), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8722181 in words is "eight million, seven hundred twenty-two thousand, one hundred eighty-one".