131366434571 has 2 divisors, whose sum is σ = 131366434572. Its totient is φ = 131366434570.

The previous prime is 131366434567. The next prime is 131366434607. The reversal of 131366434571 is 175434663131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131366434571 - 2² = 131366434567 is a prime.

It is not a weakly prime, because it can be changed into another prime (131366434501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65683217285 + 65683217286.

It is an arithmetic number, because the mean of its divisors is an integer number (65683217286).

Almost surely, 2^131366434571 is an apocalyptic number.

131366434571 is a deficient number, since it is larger than the sum of its proper divisors (1).

131366434571 is an equidigital number, since it uses as much as digits as its factorization.

131366434571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The spelling of 131366434571 in words is "one hundred thirty-one billion, three hundred sixty-six million, four hundred thirty-four thousand, five hundred seventy-one".