11221504 has 80 divisors (see below), whose sum is σ = 26712576. Its totient is φ = 4608000.

The previous prime is 11221501. The next prime is 11221523. The reversal of 11221504 is 40512211.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (11221501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111054 + ... + 111154.

Almost surely, 2^11221504 is an apocalyptic number.

11221504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13356288).

11221504 is an abundant number, since it is smaller than the sum of its proper divisors (15491072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221504 is an equidigital number, since it uses as much as digits as its factorization.

11221504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 11221504 is about 3349.8513399851. The cubic root of 11221504 is about 223.8808890555.

Adding to 11221504 its reverse (40512211), we get a palindrome (51733715).

The spelling of 11221504 in words is "eleven million, two hundred twenty-one thousand, five hundred four".