13021224 has 16 divisors (see below), whose sum is σ = 32553120. Its totient is φ = 4340400.

The previous prime is 13021219. The next prime is 13021247. The reversal of 13021224 is 42212031.

It is a super-3 number, since 3×13021224³ (a number of 22 digits) contains 333 as substring.

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, 271252 + ... + 271299.

It is an arithmetic number, because the mean of its divisors is an integer number (2034570).

Almost surely, 2^13021224 is an apocalyptic number.

It is an amenable number.

13021224 is an abundant number, since it is smaller than the sum of its proper divisors (19531896).

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

13021224 is a wasteful number, since it uses less digits than its factorization.

13021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542560 (or 542556 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 13021224 is about 3608.4933143904. The cubic root of 13021224 is about 235.2613600377.

Adding to 13021224 its reverse (42212031), we get a palindrome (55233255).

The spelling of 13021224 in words is "thirteen million, twenty-one thousand, two hundred twenty-four".