131315117 has 2 divisors, whose sum is σ = 131315118. Its totient is φ = 131315116.

The previous prime is 131315071. The next prime is 131315159. The reversal of 131315117 is 711513131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68128516 + 63186601 = 8254^2 + 7949^2 .

It is a cyclic number.

It is not a de Polignac number, because 131315117 - 2⁶ = 131315053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131315092 and 131315101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131315417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65657558 + 65657559.

It is an arithmetic number, because the mean of its divisors is an integer number (65657559).

Almost surely, 2^131315117 is an apocalyptic number.

It is an amenable number.

131315117 is a deficient number, since it is larger than the sum of its proper divisors (1).

131315117 is an equidigital number, since it uses as much as digits as its factorization.

131315117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315, while the sum is 23.

The square root of 131315117 is about 11459.2808238563. The cubic root of 131315117 is about 508.2822085524.

Adding to 131315117 its reverse (711513131), we get a palindrome (842828248).

The spelling of 131315117 in words is "one hundred thirty-one million, three hundred fifteen thousand, one hundred seventeen".