2271881 has 2 divisors, whose sum is σ = 2271882. Its totient is φ = 2271880.

The previous prime is 2271877. The next prime is 2271883. The reversal of 2271881 is 1881722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 1081600 = 1091^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2271881 - 2² = 2271877 is a prime.

It is a super-2 number, since 2×2271881² = 10322886556322, which contains 22 as substring.

Together with 2271883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2271883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135940 + 1135941.

It is an arithmetic number, because the mean of its divisors is an integer number (1135941).

2^2271881 is an apocalyptic number.

It is an amenable number.

2271881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2271881 is an equidigital number, since it uses as much as digits as its factorization.

2271881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 29.

The square root of 2271881 is about 1507.2760198451. The cubic root of 2271881 is about 131.4604737908.

The spelling of 2271881 in words is "two million, two hundred seventy-one thousand, eight hundred eighty-one".