131440325 has 12 divisors (see below), whose sum is σ = 168607140. Its totient is φ = 101525760.

The previous prime is 131440319. The next prime is 131440327. The reversal of 131440325 is 523044131.

It can be written as a sum of positive squares in 6 ways, for example, as 3818116 + 127622209 = 1954^2 + 11297^2 .

It is not a de Polignac number, because 131440325 - 2⁶ = 131440261 is a prime.

It is a super-2 number, since 2×131440325² = 34553118072211250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131440325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440327) 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 11 ways as a sum of consecutive naturals, for example, 89924 + ... + 91373.

It is an arithmetic number, because the mean of its divisors is an integer number (14050595).

Almost surely, 2^131440325 is an apocalyptic number.

It is an amenable number.

131440325 is a deficient number, since it is larger than the sum of its proper divisors (37166815).

131440325 is a wasteful number, since it uses less digits than its factorization.

131440325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181336 (or 181331 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 131440325 is about 11464.7426922718. The cubic root of 131440325 is about 508.4437050195.

Adding to 131440325 its reverse (523044131), we get a palindrome (654484456).

The spelling of 131440325 in words is "one hundred thirty-one million, four hundred forty thousand, three hundred twenty-five".