211404043 has 2 divisors, whose sum is σ = 211404044. Its totient is φ = 211404042.

The previous prime is 211404041. The next prime is 211404059. The reversal of 211404043 is 340404112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211404043 - 2¹ = 211404041 is a prime.

Together with 211404041, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 211404043.

It is not a weakly prime, because it can be changed into another prime (211404041) 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, 105702021 + 105702022.

It is an arithmetic number, because the mean of its divisors is an integer number (105702022).

Almost surely, 2^211404043 is an apocalyptic number.

211404043 is a deficient number, since it is larger than the sum of its proper divisors (1).

211404043 is an equidigital number, since it uses as much as digits as its factorization.

211404043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 211404043 is about 14539.7401283517. The cubic root of 211404043 is about 595.7139399790.

Adding to 211404043 its reverse (340404112), we get a palindrome (551808155).

The spelling of 211404043 in words is "two hundred eleven million, four hundred four thousand, forty-three".