13221325 has 24 divisors (see below), whose sum is σ = 18701928. Its totient is φ = 9185280.

The previous prime is 13221317. The next prime is 13221337. The reversal of 13221325 is 52312231.

It can be written as a sum of positive squares in 12 ways, for example, as 8145316 + 5076009 = 2854^2 + 2253^2 .

It is not a de Polignac number, because 13221325 - 2³ = 13221317 is a prime.

It is a super-3 number, since 3×13221325³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4329 + ... + 6721.

It is an arithmetic number, because the mean of its divisors is an integer number (779247).

Almost surely, 2^13221325 is an apocalyptic number.

It is an amenable number.

13221325 is a deficient number, since it is larger than the sum of its proper divisors (5480603).

13221325 is a wasteful number, since it uses less digits than its factorization.

13221325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2428 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 13221325 is about 3636.1139971129. The cubic root of 13221325 is about 236.4603494085.

Adding to 13221325 its reverse (52312231), we get a palindrome (65533556).

The spelling of 13221325 in words is "thirteen million, two hundred twenty-one thousand, three hundred twenty-five".