131431140 has 48 divisors (see below), whose sum is σ = 408898560. Its totient is φ = 35048160.

The previous prime is 131431127. The next prime is 131431147. The reversal of 131431140 is 41134131.

131431140 is a `hidden beast` number, since 1 + 314 + 311 + 40 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (131431147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121156 + ... + 122235.

It is an arithmetic number, because the mean of its divisors is an integer number (8518720).

Almost surely, 2^131431140 is an apocalyptic number.

131431140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131431140 is an abundant number, since it is smaller than the sum of its proper divisors (277467420).

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

131431140 is a wasteful number, since it uses less digits than its factorization.

131431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243409 (or 243401 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 131431140 is about 11464.3421093406. The cubic root of 131431140 is about 508.4318614593.

Adding to 131431140 its reverse (41134131), we get a palindrome (172565271).

The spelling of 131431140 in words is "one hundred thirty-one million, four hundred thirty-one thousand, one hundred forty".