131812272531821 has 16 divisors (see below), whose sum is σ = 150880640711424. Its totient is φ = 112803446859264.

The previous prime is 131812272531767. The next prime is 131812272531847. The reversal of 131812272531821 is 128135272218131.

It is not a de Polignac number, because 131812272531821 - 2¹⁰ = 131812272530797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131812272531851) 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 15 ways as a sum of consecutive naturals, for example, 48921395 + ... + 51545391.

It is an arithmetic number, because the mean of its divisors is an integer number (9430040044464).

Almost surely, 2^{131812272531821} is an apocalyptic number.

It is an amenable number.

131812272531821 is a deficient number, since it is larger than the sum of its proper divisors (19068368179603).

131812272531821 is a wasteful number, since it uses less digits than its factorization.

131812272531821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635340.

The product of its digits is 322560, while the sum is 47.

The spelling of 131812272531821 in words is "one hundred thirty-one trillion, eight hundred twelve billion, two hundred seventy-two million, five hundred thirty-one thousand, eight hundred twenty-one".