131235505023541 has 4 divisors (see below), whose sum is σ = 131236877143584. Its totient is φ = 131234132903500.

The previous prime is 131235505023533. The next prime is 131235505023547. The reversal of 131235505023541 is 145320505532131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131235505023541 - 2³ = 131235505023533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131235505023494 and 131235505023503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131235505023547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685916545 + ... + 686107846.

It is an arithmetic number, because the mean of its divisors is an integer number (32809219285896).

Almost surely, 2^{131235505023541} is an apocalyptic number.

It is an amenable number.

131235505023541 is a deficient number, since it is larger than the sum of its proper divisors (1372120043).

131235505023541 is an equidigital number, since it uses as much as digits as its factorization.

131235505023541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372120042.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 131235505023541 in words is "one hundred thirty-one trillion, two hundred thirty-five billion, five hundred five million, twenty-three thousand, five hundred forty-one".