131812272531631 has 4 divisors (see below), whose sum is σ = 131859331539264. Its totient is φ = 131765213524000.

The previous prime is 131812272531629. The next prime is 131812272531727. The reversal of 131812272531631 is 136135272218131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131812272531631 - 2¹ = 131812272531629 is a prime.

It is a super-2 number, since 2×131812272531631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131812272531131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23529499615 + ... + 23529505216.

It is an arithmetic number, because the mean of its divisors is an integer number (32964832884816).

Almost surely, 2^{131812272531631} is an apocalyptic number.

131812272531631 is a deficient number, since it is larger than the sum of its proper divisors (47059007633).

131812272531631 is an equidigital number, since it uses as much as digits as its factorization.

131812272531631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47059007632.

The product of its digits is 362880, while the sum is 46.

The spelling of 131812272531631 in words is "one hundred thirty-one trillion, eight hundred twelve billion, two hundred seventy-two million, five hundred thirty-one thousand, six hundred thirty-one".