131321232 has 60 divisors (see below), whose sum is σ = 420022720. Its totient is φ = 37520064.

The previous prime is 131321231. The next prime is 131321249. The reversal of 131321232 is 232123131.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64132 + ... + 66147.

Almost surely, 2^131321232 is an apocalyptic number.

131321232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131321232 is an abundant number, since it is smaller than the sum of its proper divisors (288701488).

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

131321232 is a wasteful number, since it uses less digits than its factorization.

131321232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130300 (or 130291 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131321232 is about 11459.5476350509. The cubic root of 131321232 is about 508.2900982190.

Adding to 131321232 its reverse (232123131), we get a palindrome (363444363).

The spelling of 131321232 in words is "one hundred thirty-one million, three hundred twenty-one thousand, two hundred thirty-two".