131531536563 has 16 divisors (see below), whose sum is σ = 203251954176. Its totient is φ = 74102273280.

The previous prime is 131531536559. The next prime is 131531536567. The reversal of 131531536563 is 365635135131.

It is an interprime number because it is at equal distance from previous prime (131531536559) and next prime (131531536567).

It is not a de Polignac number, because 131531536563 - 2² = 131531536559 is a prime.

It is a super-4 number, since 4×131531536563⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is not an unprimeable number, because it can be changed into a prime (131531536567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44107006 + ... + 44109987.

It is an arithmetic number, because the mean of its divisors is an integer number (12703247136).

Almost surely, 2^131531536563 is an apocalyptic number.

131531536563 is a deficient number, since it is larger than the sum of its proper divisors (71720417613).

131531536563 is an equidigital number, since it uses as much as digits as its factorization.

131531536563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88217074.

The product of its digits is 364500, while the sum is 42.

The spelling of 131531536563 in words is "one hundred thirty-one billion, five hundred thirty-one million, five hundred thirty-six thousand, five hundred sixty-three".