131325640 has 16 divisors (see below), whose sum is σ = 295482780. Its totient is φ = 52530240.

The previous prime is 131325577. The next prime is 131325673. The reversal of 131325640 is 46523131.

It can be written as a sum of positive squares in 2 ways, for example, as 124679556 + 6646084 = 11166^2 + 2578^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1641531 + ... + 1641610.

Almost surely, 2^131325640 is an apocalyptic number.

131325640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131325640 is an abundant number, since it is smaller than the sum of its proper divisors (164157140).

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

131325640 is a wasteful number, since it uses less digits than its factorization.

131325640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283152 (or 3283148 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 131325640 is about 11459.7399621457. The cubic root of 131325640 is about 508.2957853361.

Adding to 131325640 its reverse (46523131), we get a palindrome (177848771).

The spelling of 131325640 in words is "one hundred thirty-one million, three hundred twenty-five thousand, six hundred forty".