13531232 has 48 divisors (see below), whose sum is σ = 31307472. Its totient is φ = 5675520.

The previous prime is 13531229. The next prime is 13531277. The reversal of 13531232 is 23213531.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3098 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (652239).

Almost surely, 2^13531232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13531232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15653736).

13531232 is an abundant number, since it is smaller than the sum of its proper divisors (17776240).

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

13531232 is a wasteful number, since it uses less digits than its factorization.

13531232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2983 counting only the distinct ones).

The product of its digits is 540, while the sum is 20.

The square root of 13531232 is about 3678.4822957301. The cubic root of 13531232 is about 238.2936375224.

Adding to 13531232 its reverse (23213531), we get a palindrome (36744763).

The spelling of 13531232 in words is "thirteen million, five hundred thirty-one thousand, two hundred thirty-two".