131240644 has 12 divisors (see below), whose sum is σ = 235012624. Its totient is φ = 64094184.

The previous prime is 131240633. The next prime is 131240651. The reversal of 131240644 is 446042131.

131240644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381342 + ... + 381685.

Almost surely, 2^131240644 is an apocalyptic number.

It is an amenable number.

131240644 is a deficient number, since it is larger than the sum of its proper divisors (103771980).

131240644 is a wasteful number, since it uses less digits than its factorization.

131240644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763074 (or 763072 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 131240644 is about 11456.0309007963. The cubic root of 131240644 is about 508.1861026864.

Adding to 131240644 its reverse (446042131), we get a palindrome (577282775).

The spelling of 131240644 in words is "one hundred thirty-one million, two hundred forty thousand, six hundred forty-four".