13311232 has 72 divisors (see below), whose sum is σ = 30169440. Its totient is φ = 5806080.

The previous prime is 13311223. The next prime is 13311239. The reversal of 13311232 is 23211331.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13311239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81583 + ... + 81745.

It is an arithmetic number, because the mean of its divisors is an integer number (419020).

Almost surely, 2^13311232 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 13311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15084720).

13311232 is an abundant number, since it is smaller than the sum of its proper divisors (16858208).

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

13311232 is a wasteful number, since it uses less digits than its factorization.

13311232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 205 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 13311232 is about 3648.4561118369. The cubic root of 13311232 is about 236.9951276987.

Adding to 13311232 its reverse (23211331), we get a palindrome (36522563).

Subtracting 13311232 from its reverse (23211331), we obtain a palindrome (9900099).

It can be divided in two parts, 133 and 11232, that multiplied together give a triangular number (1493856 = T₁₇₂₈).

The spelling of 13311232 in words is "thirteen million, three hundred eleven thousand, two hundred thirty-two".