131312144 has 10 divisors (see below), whose sum is σ = 254417310. Its totient is φ = 65656064.

The previous prime is 131312047. The next prime is 131312147. The reversal of 131312144 is 441213131.

It can be written as a sum of positive squares in only one way, i.e., 82591744 + 48720400 = 9088^2 + 6980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4103489 + ... + 4103520.

It is an arithmetic number, because the mean of its divisors is an integer number (25441731).

Almost surely, 2^131312144 is an apocalyptic number.

It is an amenable number.

131312144 is a deficient number, since it is larger than the sum of its proper divisors (123105166).

131312144 is an equidigital number, since it uses as much as digits as its factorization.

131312144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207017 (or 8207011 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 131312144 is about 11459.1511029395. The cubic root of 131312144 is about 508.2783726539.

Adding to 131312144 its reverse (441213131), we get a palindrome (572525275).

The spelling of 131312144 in words is "one hundred thirty-one million, three hundred twelve thousand, one hundred forty-four".