131240144 has 40 divisors (see below), whose sum is σ = 305903040. Its totient is φ = 53284608.

The previous prime is 131240141. The next prime is 131240177. The reversal of 131240144 is 441042131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131240141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28709 + ... + 32964.

It is an arithmetic number, because the mean of its divisors is an integer number (7647576).

Almost surely, 2^131240144 is an apocalyptic number.

131240144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131240144 is an abundant number, since it is smaller than the sum of its proper divisors (174662896).

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

131240144 is a wasteful number, since it uses less digits than its factorization.

131240144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61707 (or 61701 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 131240144 is about 11456.0090782087. The cubic root of 131240144 is about 508.1854573239.

Adding to 131240144 its reverse (441042131), we get a palindrome (572282275).

The spelling of 131240144 in words is "one hundred thirty-one million, two hundred forty thousand, one hundred forty-four".