2227681 has 4 divisors (see below), whose sum is σ = 2232000. Its totient is φ = 2223364.

The previous prime is 2227669. The next prime is 2227717. The reversal of 2227681 is 1867222.

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 2227681 - 2⁵ = 2227649 is a prime.

It is a super-2 number, since 2×2227681² = 9925125275522, which contains 22 as substring.

It is a Duffinian number.

2227681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2227601) 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, 1261 + ... + 2458.

It is an arithmetic number, because the mean of its divisors is an integer number (558000).

2^2227681 is an apocalyptic number.

It is an amenable number.

2227681 is a deficient number, since it is larger than the sum of its proper divisors (4319).

2227681 is an equidigital number, since it uses as much as digits as its factorization.

2227681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318.

The product of its digits is 2688, while the sum is 28.

The square root of 2227681 is about 1492.5417917097. The cubic root of 2227681 is about 130.6023526284.

The spelling of 2227681 in words is "two million, two hundred twenty-seven thousand, six hundred eighty-one".