131544521 has 16 divisors (see below), whose sum is σ = 146821248. Its totient is φ = 117216000.

The previous prime is 131544503. The next prime is 131544541. The reversal of 131544521 is 125445131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131544521 is a prime.

It is a super-2 number, since 2×131544521² = 34607922010238882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131544541) 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 15 ways as a sum of consecutive naturals, for example, 37826 + ... + 41156.

It is an arithmetic number, because the mean of its divisors is an integer number (9176328).

Almost surely, 2^131544521 is an apocalyptic number.

It is an amenable number.

131544521 is a deficient number, since it is larger than the sum of its proper divisors (15276727).

131544521 is a wasteful number, since it uses less digits than its factorization.

131544521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472.

The product of its digits is 2400, while the sum is 26.

The square root of 131544521 is about 11469.2859847508. The cubic root of 131544521 is about 508.5780215050.

Adding to 131544521 its reverse (125445131), we get a palindrome (256989652).

The spelling of 131544521 in words is "one hundred thirty-one million, five hundred forty-four thousand, five hundred twenty-one".