13631232 has 36 divisors (see below), whose sum is σ = 36281000. Its totient is φ = 4543488.

The previous prime is 13631221. The next prime is 13631257. The reversal of 13631232 is 23213631.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 13631199 and 13631208.

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, 8107 + ... + 9642.

Almost surely, 2^13631232 is an apocalyptic number.

13631232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13631232 is an abundant number, since it is smaller than the sum of its proper divisors (22649768).

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

13631232 is an equidigital number, since it uses as much as digits as its factorization.

13631232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17768 (or 17754 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 13631232 is about 3692.0498371501. The cubic root of 13631232 is about 238.8792186298.

Adding to 13631232 its reverse (23213631), we get a palindrome (36844863).

The spelling of 13631232 in words is "thirteen million, six hundred thirty-one thousand, two hundred thirty-two".