11223220 has 12 divisors (see below), whose sum is σ = 23568804. Its totient is φ = 4489280.

The previous prime is 11223181. The next prime is 11223253. The reversal of 11223220 is 2232211.

It can be written as a sum of positive squares in 2 ways, for example, as 1313316 + 9909904 = 1146^2 + 3148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11223220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280561 + ... + 280600.

It is an arithmetic number, because the mean of its divisors is an integer number (1964067).

Almost surely, 2^11223220 is an apocalyptic number.

11223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11223220 is an abundant number, since it is smaller than the sum of its proper divisors (12345584).

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

11223220 is a wasteful number, since it uses less digits than its factorization.

11223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561170 (or 561168 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 11223220 is about 3350.1074609630. The cubic root of 11223220 is about 223.8923004796.

Adding to 11223220 its reverse (2232211), we get a palindrome (13455431).

It can be divided in two parts, 112 and 23220, that added together give a palindrome (23332).

The spelling of 11223220 in words is "eleven million, two hundred twenty-three thousand, two hundred twenty".