131240636 has 24 divisors (see below), whose sum is σ = 232968960. Its totient is φ = 64684592.

The previous prime is 131240633. The next prime is 131240651. The reversal of 131240636 is 636042131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131240633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101651 + ... + 102933.

It is an arithmetic number, because the mean of its divisors is an integer number (9707040).

Almost surely, 2^131240636 is an apocalyptic number.

It is an amenable number.

131240636 is a deficient number, since it is larger than the sum of its proper divisors (101728324).

131240636 is a wasteful number, since it uses less digits than its factorization.

131240636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 131240636 is about 11456.0305516352. The cubic root of 131240636 is about 508.1860923607.

Adding to 131240636 its reverse (636042131), we get a palindrome (767282767).

The spelling of 131240636 in words is "one hundred thirty-one million, two hundred forty thousand, six hundred thirty-six".