11223520 has 96 divisors (see below), whose sum is σ = 33094656. Its totient is φ = 3494400.

The previous prime is 11223503. The next prime is 11223521. The reversal of 11223520 is 2532211.

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

It is a junction number, because it is equal to n+sod(n) for n = 11223494 and 11223503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11865 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

Almost surely, 2^11223520 is an apocalyptic number.

11223520 is a gapful number since it is divisible by the number (10) 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 11223520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16547328).

11223520 is an abundant number, since it is smaller than the sum of its proper divisors (21871136).

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

11223520 is a wasteful number, since it uses less digits than its factorization.

11223520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 11223520 is about 3350.1522353469. The cubic root of 11223520 is about 223.8942953644.

Adding to 11223520 its reverse (2532211), we get a palindrome (13755731).

It can be divided in two parts, 112 and 23520, that added together give a palindrome (23632).

The spelling of 11223520 in words is "eleven million, two hundred twenty-three thousand, five hundred twenty".