2271281 has 2 divisors, whose sum is σ = 2271282. Its totient is φ = 2271280.

The previous prime is 2271271. The next prime is 2271287. The reversal of 2271281 is 1821722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1934881 + 336400 = 1391^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2271281 is a prime.

It is a super-2 number, since 2×2271281² = 10317434761922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2271287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135640 + 1135641.

It is an arithmetic number, because the mean of its divisors is an integer number (1135641).

2^2271281 is an apocalyptic number.

It is an amenable number.

2271281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2271281 is an equidigital number, since it uses as much as digits as its factorization.

2271281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 23.

The square root of 2271281 is about 1507.0769721550. The cubic root of 2271281 is about 131.4488999409.

It can be divided in two parts, 2271 and 281, that added together give a palindrome (2552).

The spelling of 2271281 in words is "two million, two hundred seventy-one thousand, two hundred eighty-one".