131544001531 has 8 divisors (see below), whose sum is σ = 139322517264. Its totient is φ = 123770000640.

The previous prime is 131544001517. The next prime is 131544001549. The reversal of 131544001531 is 135100445131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131544001531 is a prime.

It is a super-2 number, since 2×131544001531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131544001531.

It is not an unprimeable number, because it can be changed into a prime (131544001571) 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, 1068625 + ... + 1185346.

It is an arithmetic number, because the mean of its divisors is an integer number (17415314658).

Almost surely, 2^131544001531 is an apocalyptic number.

131544001531 is a deficient number, since it is larger than the sum of its proper divisors (7778515733).

131544001531 is a wasteful number, since it uses less digits than its factorization.

131544001531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257421.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 131544001531 its reverse (135100445131), we get a palindrome (266644446662).

The spelling of 131544001531 in words is "one hundred thirty-one billion, five hundred forty-four million, one thousand, five hundred thirty-one".