211140343 has 2 divisors, whose sum is σ = 211140344. Its totient is φ = 211140342.

The previous prime is 211140233. The next prime is 211140451. The reversal of 211140343 is 343041112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211140343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211140343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211140143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105570171 + 105570172.

It is an arithmetic number, because the mean of its divisors is an integer number (105570172).

Almost surely, 2^211140343 is an apocalyptic number.

211140343 is a deficient number, since it is larger than the sum of its proper divisors (1).

211140343 is an equidigital number, since it uses as much as digits as its factorization.

211140343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 211140343 is about 14530.6690486020. The cubic root of 211140343 is about 595.4661441381.

Adding to 211140343 its reverse (343041112), we get a palindrome (554181455).

The spelling of 211140343 in words is "two hundred eleven million, one hundred forty thousand, three hundred forty-three".