131262217 has 2 divisors, whose sum is σ = 131262218. Its totient is φ = 131262216.

The previous prime is 131262169. The next prime is 131262223. The reversal of 131262217 is 712262131.

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., 127667401 + 3594816 = 11299^2 + 1896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131262217 is a prime.

It is a super-2 number, since 2×131262217² = 34459539223510178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131262191 and 131262200.

It is not a weakly prime, because it can be changed into another prime (131262517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65631108 + 65631109.

It is an arithmetic number, because the mean of its divisors is an integer number (65631109).

Almost surely, 2^131262217 is an apocalyptic number.

It is an amenable number.

131262217 is a deficient number, since it is larger than the sum of its proper divisors (1).

131262217 is an equidigital number, since it uses as much as digits as its factorization.

131262217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 131262217 is about 11456.9724185755. The cubic root of 131262217 is about 508.2139459364.

The spelling of 131262217 in words is "one hundred thirty-one million, two hundred sixty-two thousand, two hundred seventeen".