11226581 has 2 divisors, whose sum is σ = 11226582. Its totient is φ = 11226580.

The previous prime is 11226563. The next prime is 11226601. The reversal of 11226581 is 18562211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10504081 + 722500 = 3241^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 11226581 - 2⁶ = 11226517 is a prime.

It is a super-2 number, since 2×11226581² = 252072241899122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11226581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11226521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5613290 + 5613291.

It is an arithmetic number, because the mean of its divisors is an integer number (5613291).

Almost surely, 2^11226581 is an apocalyptic number.

It is an amenable number.

11226581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11226581 is an equidigital number, since it uses as much as digits as its factorization.

11226581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 11226581 is about 3350.6090491133. The cubic root of 11226581 is about 223.9146478071.

Adding to 11226581 its reverse (18562211), we get a palindrome (29788792).

The spelling of 11226581 in words is "eleven million, two hundred twenty-six thousand, five hundred eighty-one".