131617218631 has 2 divisors, whose sum is σ = 131617218632. Its totient is φ = 131617218630.

The previous prime is 131617218571. The next prime is 131617218643. The reversal of 131617218631 is 136812716131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131617218631 - 2⁹ = 131617218119 is a prime.

It is a super-2 number, since 2×131617218631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131617210631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65808609315 + 65808609316.

It is an arithmetic number, because the mean of its divisors is an integer number (65808609316).

Almost surely, 2^131617218631 is an apocalyptic number.

131617218631 is a deficient number, since it is larger than the sum of its proper divisors (1).

131617218631 is an equidigital number, since it uses as much as digits as its factorization.

131617218631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The spelling of 131617218631 in words is "one hundred thirty-one billion, six hundred seventeen million, two hundred eighteen thousand, six hundred thirty-one".