11228681 has 2 divisors, whose sum is σ = 11228682. Its totient is φ = 11228680.

The previous prime is 11228671. The next prime is 11228683. The reversal of 11228681 is 18682211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 173056 = 3325^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 11228681 - 2⁶ = 11228617 is a prime.

It is a super-2 number, since 2×11228681² = 252166553999522, which contains 22 as substring.

Together with 11228683, 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 (11228683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5614340 + 5614341.

It is an arithmetic number, because the mean of its divisors is an integer number (5614341).

Almost surely, 2^11228681 is an apocalyptic number.

It is an amenable number.

11228681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11228681 is an equidigital number, since it uses as much as digits as its factorization.

11228681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 29.

The square root of 11228681 is about 3350.9224103223. The cubic root of 11228681 is about 223.9286084672.

The spelling of 11228681 in words is "eleven million, two hundred twenty-eight thousand, six hundred eighty-one".