211420343 has 2 divisors, whose sum is σ = 211420344. Its totient is φ = 211420342.

The previous prime is 211420289. The next prime is 211420351. The reversal of 211420343 is 343024112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211420343 - 2²⁰ = 210371767 is a prime.

It is a super-2 number, since 2×211420343² = 89397122868475298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211420373) 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, 105710171 + 105710172.

It is an arithmetic number, because the mean of its divisors is an integer number (105710172).

Almost surely, 2^211420343 is an apocalyptic number.

211420343 is a deficient number, since it is larger than the sum of its proper divisors (1).

211420343 is an equidigital number, since it uses as much as digits as its factorization.

211420343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 211420343 is about 14540.3006502617. The cubic root of 211420343 is about 595.7292501367.

Adding to 211420343 its reverse (343024112), we get a palindrome (554444455).

The spelling of 211420343 in words is "two hundred eleven million, four hundred twenty thousand, three hundred forty-three".