131940144 has 240 divisors, whose sum is σ = 461399040. Its totient is φ = 35925120.

The previous prime is 131940143. The next prime is 131940181. The reversal of 131940144 is 441049131.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131940143) 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 47 ways as a sum of consecutive naturals, for example, 486729 + ... + 486999.

It is an arithmetic number, because the mean of its divisors is an integer number (1922496).

Almost surely, 2^131940144 is an apocalyptic number.

131940144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131940144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230699520).

131940144 is an abundant number, since it is smaller than the sum of its proper divisors (329458896).

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

131940144 is a wasteful number, since it uses less digits than its factorization.

131940144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 131940144 is about 11486.5200996646. The cubic root of 131940144 is about 509.0873643693.

Adding to 131940144 its reverse (441049131), we get a palindrome (572989275).

The spelling of 131940144 in words is "one hundred thirty-one million, nine hundred forty thousand, one hundred forty-four".