131203213 has 2 divisors, whose sum is σ = 131203214. Its totient is φ = 131203212.

The previous prime is 131203169. The next prime is 131203217. The reversal of 131203213 is 312302131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118657449 + 12545764 = 10893^2 + 3542^2 .

It is a cyclic number.

It is not a de Polignac number, because 131203213 - 2²⁵ = 97648781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131203217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65601606 + 65601607.

It is an arithmetic number, because the mean of its divisors is an integer number (65601607).

Almost surely, 2^131203213 is an apocalyptic number.

It is an amenable number.

131203213 is a deficient number, since it is larger than the sum of its proper divisors (1).

131203213 is an equidigital number, since it uses as much as digits as its factorization.

131203213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131203213 is about 11454.3971032962. The cubic root of 131203213 is about 508.1377850258.

Adding to 131203213 its reverse (312302131), we get a palindrome (443505344).

The spelling of 131203213 in words is "one hundred thirty-one million, two hundred three thousand, two hundred thirteen".