131312232 has 64 divisors (see below), whose sum is σ = 377352000. Its totient is φ = 42259392.

The previous prime is 131312227. The next prime is 131312243. The reversal of 131312232 is 232213131.

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 and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4218 + ... + 16745.

It is an arithmetic number, because the mean of its divisors is an integer number (5896125).

Almost surely, 2^131312232 is an apocalyptic number.

131312232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131312232 is an abundant number, since it is smaller than the sum of its proper divisors (246039768).

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

131312232 is a wasteful number, since it uses less digits than its factorization.

131312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21007 (or 20997 counting only the distinct ones).

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

The square root of 131312232 is about 11459.1549426648. The cubic root of 131312232 is about 508.2784861963.

Adding to 131312232 its reverse (232213131), we get a palindrome (363525363).

The spelling of 131312232 in words is "one hundred thirty-one million, three hundred twelve thousand, two hundred thirty-two".