13105220 has 12 divisors (see below), whose sum is σ = 27521004. Its totient is φ = 5242080.

The previous prime is 13105217. The next prime is 13105247. The reversal of 13105220 is 2250131.

It is a happy number.

13105220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 3655744 = 3074^2 + 1912^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13105195 and 13105204.

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, 327611 + ... + 327650.

It is an arithmetic number, because the mean of its divisors is an integer number (2293417).

Almost surely, 2^13105220 is an apocalyptic number.

13105220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13105220 is an abundant number, since it is smaller than the sum of its proper divisors (14415784).

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

13105220 is a wasteful number, since it uses less digits than its factorization.

13105220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655270 (or 655268 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 13105220 is about 3620.1132578968. The cubic root of 13105220 is about 235.7661429480.

Adding to 13105220 its reverse (2250131), we get a palindrome (15355351).

It can be divided in two parts, 131052 and 20, that added together give a 17-th power (131072 = 2¹⁷).

The spelling of 13105220 in words is "thirteen million, one hundred five thousand, two hundred twenty".