131318783171 has 2 divisors, whose sum is σ = 131318783172. Its totient is φ = 131318783170.

The previous prime is 131318783093. The next prime is 131318783177. The reversal of 131318783171 is 171387813131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131318783171 is a prime.

It is a super-2 number, since 2×131318783171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131318783177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65659391585 + 65659391586.

It is an arithmetic number, because the mean of its divisors is an integer number (65659391586).

Almost surely, 2^131318783171 is an apocalyptic number.

131318783171 is a deficient number, since it is larger than the sum of its proper divisors (1).

131318783171 is an equidigital number, since it uses as much as digits as its factorization.

131318783171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 44.

The spelling of 131318783171 in words is "one hundred thirty-one billion, three hundred eighteen million, seven hundred eighty-three thousand, one hundred seventy-one".