131640232 has 16 divisors (see below), whose sum is σ = 252077760. Its totient is φ = 64419504.

The previous prime is 131640211. The next prime is 131640233. The reversal of 131640232 is 232046131.

It is not an unprimeable number, because it can be changed into a prime (131640233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174678 + ... + 175429.

It is an arithmetic number, because the mean of its divisors is an integer number (15754860).

Almost surely, 2^131640232 is an apocalyptic number.

It is an amenable number.

131640232 is a deficient number, since it is larger than the sum of its proper divisors (120437528).

131640232 is a wasteful number, since it uses less digits than its factorization.

131640232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350160 (or 350156 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 131640232 is about 11473.4577177066. The cubic root of 131640232 is about 508.7013377020.

Adding to 131640232 its reverse (232046131), we get a palindrome (363686363).

The spelling of 131640232 in words is "one hundred thirty-one million, six hundred forty thousand, two hundred thirty-two".