131317217 has 2 divisors, whose sum is σ = 131317218. Its totient is φ = 131317216.

The previous prime is 131317211. The next prime is 131317223. The reversal of 131317217 is 712713131.

It is a balanced prime because it is at equal distance from previous prime (131317211) and next prime (131317223).

It can be written as a sum of positive squares in only one way, i.e., 70492816 + 60824401 = 8396^2 + 7799^2 .

It is a cyclic number.

It is not a de Polignac number, because 131317217 - 2¹⁰ = 131316193 is a prime.

It is a super-2 number, since 2×131317217² = 34488422961250178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131317211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65658608 + 65658609.

It is an arithmetic number, because the mean of its divisors is an integer number (65658609).

Almost surely, 2^131317217 is an apocalyptic number.

It is an amenable number.

131317217 is a deficient number, since it is larger than the sum of its proper divisors (1).

131317217 is an equidigital number, since it uses as much as digits as its factorization.

131317217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 26.

The square root of 131317217 is about 11459.3724522768. The cubic root of 131317217 is about 508.2849180322.

The spelling of 131317217 in words is "one hundred thirty-one million, three hundred seventeen thousand, two hundred seventeen".