213405191 has 2 divisors, whose sum is σ = 213405192. Its totient is φ = 213405190.

The previous prime is 213405167. The next prime is 213405211. The reversal of 213405191 is 191504312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213405191 - 2¹⁰ = 213404167 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213405191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213405121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106702595 + 106702596.

It is an arithmetic number, because the mean of its divisors is an integer number (106702596).

Almost surely, 2^213405191 is an apocalyptic number.

213405191 is a deficient number, since it is larger than the sum of its proper divisors (1).

213405191 is an equidigital number, since it uses as much as digits as its factorization.

213405191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 213405191 is about 14608.3945387575. The cubic root of 213405191 is about 597.5877135283.

The spelling of 213405191 in words is "two hundred thirteen million, four hundred five thousand, one hundred ninety-one".