132571531321991 has 2 divisors, whose sum is σ = 132571531321992. Its totient is φ = 132571531321990.

The previous prime is 132571531321963. The next prime is 132571531322047. The reversal of 132571531321991 is 199123135175231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 132571531321991 - 2³⁴ = 132554351452807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132571531321891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66285765660995 + 66285765660996.

It is an arithmetic number, because the mean of its divisors is an integer number (66285765660996).

Almost surely, 2^{132571531321991} is an apocalyptic number.

132571531321991 is a deficient number, since it is larger than the sum of its proper divisors (1).

132571531321991 is an equidigital number, since it uses as much as digits as its factorization.

132571531321991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 53.

The spelling of 132571531321991 in words is "one hundred thirty-two trillion, five hundred seventy-one billion, five hundred thirty-one million, three hundred twenty-one thousand, nine hundred ninety-one".