2214181 has 4 divisors (see below), whose sum is σ = 2256012. Its totient is φ = 2172352.

The previous prime is 2214169. The next prime is 2214193. The reversal of 2214181 is 1814122.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2214169) and next prime (2214193).

It can be written as a sum of positive squares in 2 ways, for example, as 1232100 + 982081 = 1110^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 2214181 - 2¹³ = 2205989 is a prime.

It is a super-2 number, since 2×2214181² = 9805195001522, 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 (2214101) 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, 20836 + ... + 20941.

It is an arithmetic number, because the mean of its divisors is an integer number (564003).

2^2214181 is an apocalyptic number.

It is an amenable number.

2214181 is a deficient number, since it is larger than the sum of its proper divisors (41831).

2214181 is an equidigital number, since it uses as much as digits as its factorization.

2214181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41830.

The product of its digits is 128, while the sum is 19.

The square root of 2214181 is about 1488.0124327438. The cubic root of 2214181 is about 130.3379961978.

It can be divided in two parts, 22141 and 81, that added together give a palindrome (22222).

The spelling of 2214181 in words is "two million, two hundred fourteen thousand, one hundred eighty-one".