2211281 has 2 divisors, whose sum is σ = 2211282. Its totient is φ = 2211280.

The previous prime is 2211269. The next prime is 2211329. The reversal of 2211281 is 1821122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202256 + 9025 = 1484^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211281 - 2⁶ = 2211217 is a prime.

It is a super-2 number, since 2×2211281² = 9779527321922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2211211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105640 + 1105641.

It is an arithmetic number, because the mean of its divisors is an integer number (1105641).

2^2211281 is an apocalyptic number.

It is an amenable number.

2211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211281 is an equidigital number, since it uses as much as digits as its factorization.

2211281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 17.

The square root of 2211281 is about 1487.0376592407. The cubic root of 2211281 is about 130.2810684026.

The spelling of 2211281 in words is "two million, two hundred eleven thousand, two hundred eighty-one".