9222181 has 4 divisors (see below), whose sum is σ = 9232812. Its totient is φ = 9211552.

The previous prime is 9222179. The next prime is 9222193. The reversal of 9222181 is 1812229.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5085025 + 4137156 = 2255^2 + 2034^2 .

It is a cyclic number.

It is not a de Polignac number, because 9222181 - 2¹ = 9222179 is a prime.

It is a super-2 number, since 2×9222181² = 170097244793522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9222281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3886 + ... + 5791.

It is an arithmetic number, because the mean of its divisors is an integer number (2308203).

Almost surely, 2^9222181 is an apocalyptic number.

It is an amenable number.

9222181 is a deficient number, since it is larger than the sum of its proper divisors (10631).

9222181 is an equidigital number, since it uses as much as digits as its factorization.

9222181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10630.

The product of its digits is 576, while the sum is 25.

The square root of 9222181 is about 3036.8044059504. The cubic root of 9222181 is about 209.7061725972.

The spelling of 9222181 in words is "nine million, two hundred twenty-two thousand, one hundred eighty-one".