11221544 has 8 divisors (see below), whose sum is σ = 21040410. Its totient is φ = 5610768.

The previous prime is 11221523. The next prime is 11221549. The reversal of 11221544 is 44512211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7496644 + 3724900 = 2738^2 + 1930^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (11221549) 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, 701339 + ... + 701354.

Almost surely, 2^11221544 is an apocalyptic number.

It is an amenable number.

11221544 is a deficient number, since it is larger than the sum of its proper divisors (9818866).

11221544 is a wasteful number, since it uses less digits than its factorization.

11221544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402699 (or 1402695 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 11221544 is about 3349.8573103940. The cubic root of 11221544 is about 223.8811550693.

Adding to 11221544 its reverse (44512211), we get a palindrome (55733755).

The spelling of 11221544 in words is "eleven million, two hundred twenty-one thousand, five hundred forty-four".