2281181 has 4 divisors (see below), whose sum is σ = 2607072. Its totient is φ = 1955292.

The previous prime is 2281151. The next prime is 2281183. The reversal of 2281181 is 1811822.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2281181 - 2¹⁴ = 2264797 is a prime.

It is a super-2 number, since 2×2281181² = 10407573509522, 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 (2281183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162935 + ... + 162948.

It is an arithmetic number, because the mean of its divisors is an integer number (651768).

2^2281181 is an apocalyptic number.

It is an amenable number.

2281181 is a deficient number, since it is larger than the sum of its proper divisors (325891).

2281181 is an equidigital number, since it uses as much as digits as its factorization.

2281181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325890.

The product of its digits is 256, while the sum is 23.

The square root of 2281181 is about 1510.3579046041. The cubic root of 2281181 is about 131.6396084617.

The spelling of 2281181 in words is "two million, two hundred eighty-one thousand, one hundred eighty-one".