13116220 has 48 divisors (see below), whose sum is σ = 30185568. Its totient is φ = 4757760.

The previous prime is 13116217. The next prime is 13116239. The reversal of 13116220 is 2261131.

It is a junction number, because it is equal to n+sod(n) for n = 13116194 and 13116203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15447 + ... + 16273.

It is an arithmetic number, because the mean of its divisors is an integer number (628866).

Almost surely, 2^13116220 is an apocalyptic number.

13116220 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 13116220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15092784).

13116220 is an abundant number, since it is smaller than the sum of its proper divisors (17069348).

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

13116220 is a wasteful number, since it uses less digits than its factorization.

13116220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13116220 is about 3621.6322287057. The cubic root of 13116220 is about 235.8320887391.

Adding to 13116220 its reverse (2261131), we get a palindrome (15377351).

The spelling of 13116220 in words is "thirteen million, one hundred sixteen thousand, two hundred twenty".