13207220 has 48 divisors (see below), whose sum is σ = 30293760. Its totient is φ = 4807296.

The previous prime is 13207217. The next prime is 13207247. The reversal of 13207220 is 2270231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20219 + ... + 20861.

It is an arithmetic number, because the mean of its divisors is an integer number (631120).

Almost surely, 2^13207220 is an apocalyptic number.

13207220 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 13207220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15146880).

13207220 is an abundant number, since it is smaller than the sum of its proper divisors (17086540).

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

13207220 is a wasteful number, since it uses less digits than its factorization.

13207220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 13207220 is about 3634.1739088822. The cubic root of 13207220 is about 236.3762312636.

Adding to 13207220 its reverse (2270231), we get a palindrome (15477451).

The spelling of 13207220 in words is "thirteen million, two hundred seven thousand, two hundred twenty".