2226181 has 4 divisors (see below), whose sum is σ = 2229292. Its totient is φ = 2223072.

The previous prime is 2226163. The next prime is 2226197. The reversal of 2226181 is 1816222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 749956 + 1476225 = 866^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2226181 - 2⁵ = 2226149 is a prime.

It is a super-2 number, since 2×2226181² = 9911763689522, 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 (2226131) 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, 121 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (557323).

2^2226181 is an apocalyptic number.

It is an amenable number.

2226181 is a deficient number, since it is larger than the sum of its proper divisors (3111).

2226181 is a wasteful number, since it uses less digits than its factorization.

2226181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110.

The product of its digits is 384, while the sum is 22.

The square root of 2226181 is about 1492.0392086001. The cubic root of 2226181 is about 130.5730325244.

The spelling of 2226181 in words is "two million, two hundred twenty-six thousand, one hundred eighty-one".