131651531653591 has 2 divisors, whose sum is σ = 131651531653592. Its totient is φ = 131651531653590.

The previous prime is 131651531653511. The next prime is 131651531653619. The reversal of 131651531653591 is 195356135156131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131651531653591 - 2¹¹ = 131651531651543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131651531653501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65825765826795 + 65825765826796.

It is an arithmetic number, because the mean of its divisors is an integer number (65825765826796).

Almost surely, 2^{131651531653591} is an apocalyptic number.

131651531653591 is a deficient number, since it is larger than the sum of its proper divisors (1).

131651531653591 is an equidigital number, since it uses as much as digits as its factorization.

131651531653591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5467500, while the sum is 55.

The spelling of 131651531653591 in words is "one hundred thirty-one trillion, six hundred fifty-one billion, five hundred thirty-one million, six hundred fifty-three thousand, five hundred ninety-one".