13221532 has 12 divisors (see below), whose sum is σ = 23163840. Its totient is φ = 6603296.

The previous prime is 13221503. The next prime is 13221553. The reversal of 13221532 is 23512231.

It is a congruent number.

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, 4608 + ... + 6904.

It is an arithmetic number, because the mean of its divisors is an integer number (1930320).

Almost surely, 2^13221532 is an apocalyptic number.

It is an amenable number.

13221532 is a deficient number, since it is larger than the sum of its proper divisors (9942308).

13221532 is a wasteful number, since it uses less digits than its factorization.

13221532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740 (or 3738 counting only the distinct ones).

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

The square root of 13221532 is about 3636.1424614555. The cubic root of 13221532 is about 236.4615834511.

Adding to 13221532 its reverse (23512231), we get a palindrome (36733763).

The spelling of 13221532 in words is "thirteen million, two hundred twenty-one thousand, five hundred thirty-two".