4222181 has 4 divisors (see below), whose sum is σ = 4336332. Its totient is φ = 4108032.

The previous prime is 4222177. The next prime is 4222219. The reversal of 4222181 is 1812224.

It is a happy number.

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 1865956 + 2356225 = 1366^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 4222181 - 2² = 4222177 is a prime.

It is a super-2 number, since 2×4222181² = 35653624793522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4222381) 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, 57020 + ... + 57093.

It is an arithmetic number, because the mean of its divisors is an integer number (1084083).

Almost surely, 2^4222181 is an apocalyptic number.

It is an amenable number.

4222181 is a deficient number, since it is larger than the sum of its proper divisors (114151).

4222181 is a wasteful number, since it uses less digits than its factorization.

4222181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114150.

The product of its digits is 256, while the sum is 20.

The square root of 4222181 is about 2054.7946369406. The cubic root of 4222181 is about 161.6263935299.

The spelling of 4222181 in words is "four million, two hundred twenty-two thousand, one hundred eighty-one".