213071191 has 2 divisors, whose sum is σ = 213071192. Its totient is φ = 213071190.

The previous prime is 213071171. The next prime is 213071203. The reversal of 213071191 is 191170312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213071191 - 2²⁵ = 179516759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213071141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106535595 + 106535596.

It is an arithmetic number, because the mean of its divisors is an integer number (106535596).

Almost surely, 2^213071191 is an apocalyptic number.

213071191 is a deficient number, since it is larger than the sum of its proper divisors (1).

213071191 is an equidigital number, since it uses as much as digits as its factorization.

213071191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 213071191 is about 14596.9582790388. The cubic root of 213071191 is about 597.2757896646.

The spelling of 213071191 in words is "two hundred thirteen million, seventy-one thousand, one hundred ninety-one".