16131232 has 48 divisors (see below), whose sum is σ = 36229032. Its totient is φ = 7004160.

The previous prime is 16131229. The next prime is 16131233. The reversal of 16131232 is 23213161.

It can be written as a sum of positive squares in 4 ways, for example, as 13808656 + 2322576 = 3716^2 + 1524^2 .

It is not an unprimeable number, because it can be changed into a prime (16131233) 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, 5932 + ... + 8212.

Almost surely, 2^16131232 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 16131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18114516).

16131232 is an abundant number, since it is smaller than the sum of its proper divisors (20097800).

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

16131232 is a wasteful number, since it uses less digits than its factorization.

16131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2313 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 16131232 is about 4016.3705008378. The cubic root of 16131232 is about 252.6712598245.

Adding to 16131232 its reverse (23213161), we get a palindrome (39344393).

It can be divided in two parts, 161312 and 32, that multiplied together give a square (5161984 = 2272²).

The spelling of 16131232 in words is "sixteen million, one hundred thirty-one thousand, two hundred thirty-two".