13113220 has 48 divisors (see below), whose sum is σ = 29756160. Its totient is φ = 4839296.

The previous prime is 13113181. The next prime is 13113223. The reversal of 13113220 is 2231131.

It is a self number, because there is not a number n which added to its sum of digits gives 13113220.

It is not an unprimeable number, because it can be changed into a prime (13113223) 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, 12849 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (619920).

Almost surely, 2^13113220 is an apocalyptic number.

13113220 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 13113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14878080).

13113220 is an abundant number, since it is smaller than the sum of its proper divisors (16642940).

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

13113220 is a wasteful number, since it uses less digits than its factorization.

13113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 13113220 is about 3621.2180271284. The cubic root of 13113220 is about 235.8141071811.

Adding to 13113220 its reverse (2231131), we get a palindrome (15344351).

The spelling of 13113220 in words is "thirteen million, one hundred thirteen thousand, two hundred twenty".