131544436 has 24 divisors (see below), whose sum is σ = 245621376. Its totient is φ = 61426560.

The previous prime is 131544341. The next prime is 131544451. The reversal of 131544436 is 634445131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131544398 and 131544407.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1525 + ... + 16291.

It is an arithmetic number, because the mean of its divisors is an integer number (10234224).

Almost surely, 2^131544436 is an apocalyptic number.

It is an amenable number.

131544436 is a deficient number, since it is larger than the sum of its proper divisors (114076940).

131544436 is a wasteful number, since it uses less digits than its factorization.

131544436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14919 (or 14917 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 131544436 is about 11469.2822792013. The cubic root of 131544436 is about 508.5779119625.

Adding to 131544436 its reverse (634445131), we get a palindrome (765989567).

The spelling of 131544436 in words is "one hundred thirty-one million, five hundred forty-four thousand, four hundred thirty-six".