11223281 has 8 divisors (see below), whose sum is σ = 12509280. Its totient is φ = 10006848.

The previous prime is 11223263. The next prime is 11223283. The reversal of 11223281 is 18232211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11223281 - 2¹⁰ = 11222257 is a prime.

It is a super-2 number, since 2×11223281² = 251924072809922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11223283) 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 in 7 ways as a sum of consecutive naturals, for example, 17051 + ... + 17696.

It is an arithmetic number, because the mean of its divisors is an integer number (1563660).

Almost surely, 2^11223281 is an apocalyptic number.

It is an amenable number.

11223281 is a deficient number, since it is larger than the sum of its proper divisors (1285999).

11223281 is a wasteful number, since it uses less digits than its factorization.

11223281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34783.

The product of its digits is 192, while the sum is 20.

The square root of 11223281 is about 3350.1165651362. The cubic root of 11223281 is about 223.8927061091.

Adding to 11223281 its reverse (18232211), we get a palindrome (29455492).

The spelling of 11223281 in words is "eleven million, two hundred twenty-three thousand, two hundred eighty-one".