2202181 has 4 divisors (see below), whose sum is σ = 2297952. Its totient is φ = 2106412.

The previous prime is 2202169. The next prime is 2202253. The reversal of 2202181 is 1812022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1812022 = 2 ⋅906011.

It is a cyclic number.

It is not a de Polignac number, because 2202181 - 2⁵ = 2202149 is a prime.

It is a super-2 number, since 2×2202181² = 9699202313522, 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 (2202121) 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, 47851 + ... + 47896.

It is an arithmetic number, because the mean of its divisors is an integer number (574488).

2^2202181 is an apocalyptic number.

It is an amenable number.

2202181 is a deficient number, since it is larger than the sum of its proper divisors (95771).

2202181 is an equidigital number, since it uses as much as digits as its factorization.

2202181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95770.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2202181 is about 1483.9747302431. The cubic root of 2202181 is about 130.1021091260.

It can be divided in two parts, 220 and 2181, that added together give a 4-th power (2401 = 7⁴).

The spelling of 2202181 in words is "two million, two hundred two thousand, one hundred eighty-one".