131214217 has 2 divisors, whose sum is σ = 131214218. Its totient is φ = 131214216.

The previous prime is 131214179. The next prime is 131214221. The reversal of 131214217 is 712412131.

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., 112021056 + 19193161 = 10584^2 + 4381^2 .

It is an emirp because it is prime and its reverse (712412131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131214217 - 2²³ = 122825609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131214257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65607108 + 65607109.

It is an arithmetic number, because the mean of its divisors is an integer number (65607109).

Almost surely, 2^131214217 is an apocalyptic number.

It is an amenable number.

131214217 is a deficient number, since it is larger than the sum of its proper divisors (1).

131214217 is an equidigital number, since it uses as much as digits as its factorization.

131214217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 131214217 is about 11454.8774327795. The cubic root of 131214217 is about 508.1519904499.

Adding to 131214217 its reverse (712412131), we get a palindrome (843626348).

The spelling of 131214217 in words is "one hundred thirty-one million, two hundred fourteen thousand, two hundred seventeen".