131210213 has 2 divisors, whose sum is σ = 131210214. Its totient is φ = 131210212.

The previous prime is 131210173. The next prime is 131210221. The reversal of 131210213 is 312012131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95902849 + 35307364 = 9793^2 + 5942^2 .

It is a cyclic number.

It is not a de Polignac number, because 131210213 - 2⁸ = 131209957 is a prime.

It is a super-2 number, since 2×131210213² = 34432239991010738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131210113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605106 + 65605107.

It is an arithmetic number, because the mean of its divisors is an integer number (65605107).

Almost surely, 2^131210213 is an apocalyptic number.

It is an amenable number.

131210213 is a deficient number, since it is larger than the sum of its proper divisors (1).

131210213 is an equidigital number, since it uses as much as digits as its factorization.

131210213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131210213 is about 11454.7026587337. The cubic root of 131210213 is about 508.1468216471.

Adding to 131210213 its reverse (312012131), we get a palindrome (443222344).

The spelling of 131210213 in words is "one hundred thirty-one million, two hundred ten thousand, two hundred thirteen".