13221324 has 18 divisors (see below), whose sum is σ = 33420660. Its totient is φ = 4407096.

The previous prime is 13221317. The next prime is 13221337. The reversal of 13221324 is 42312231.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×13221324³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13221297 and 13221306.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183594 + ... + 183665.

Almost surely, 2^13221324 is an apocalyptic number.

It is an amenable number.

13221324 is an abundant number, since it is smaller than the sum of its proper divisors (20199336).

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

13221324 is a wasteful number, since it uses less digits than its factorization.

13221324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367269 (or 367264 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 13221324 is about 3636.1138596034. The cubic root of 13221324 is about 236.4603434469.

Adding to 13221324 its reverse (42312231), we get a palindrome (55533555).

The spelling of 13221324 in words is "thirteen million, two hundred twenty-one thousand, three hundred twenty-four".