131724322821571 has 2 divisors, whose sum is σ = 131724322821572. Its totient is φ = 131724322821570.

The previous prime is 131724322821547. The next prime is 131724322821577. The reversal of 131724322821571 is 175128223427131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131724322821571 - 2²¹ = 131724320724419 is a prime.

It is not a weakly prime, because it can be changed into another prime (131724322821577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65862161410785 + 65862161410786.

It is an arithmetic number, because the mean of its divisors is an integer number (65862161410786).

Almost surely, 2^{131724322821571} is an apocalyptic number.

131724322821571 is a deficient number, since it is larger than the sum of its proper divisors (1).

131724322821571 is an equidigital number, since it uses as much as digits as its factorization.

131724322821571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 49.

The spelling of 131724322821571 in words is "one hundred thirty-one trillion, seven hundred twenty-four billion, three hundred twenty-two million, eight hundred twenty-one thousand, five hundred seventy-one".