13221310 has 16 divisors (see below), whose sum is σ = 24202800. Its totient is φ = 5198656.

The previous prime is 13221293. The next prime is 13221317. The reversal of 13221310 is 1312231.

It is a super-3 number, since 3×13221310³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10615 + ... + 11794.

It is an arithmetic number, because the mean of its divisors is an integer number (1512675).

Almost surely, 2^13221310 is an apocalyptic number.

13221310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13221310 is a deficient number, since it is larger than the sum of its proper divisors (10981490).

13221310 is a wasteful number, since it uses less digits than its factorization.

13221310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22475.

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

The square root of 13221310 is about 3636.1119344707. Note that the first 3 decimals coincide. The cubic root of 13221310 is about 236.4602599846.

Adding to 13221310 its reverse (1312231), we get a palindrome (14533541).

It can be divided in two parts, 13221 and 310, that added together give a palindrome (13531).

The spelling of 13221310 in words is "thirteen million, two hundred twenty-one thousand, three hundred ten".