211842193 has 2 divisors, whose sum is σ = 211842194. Its totient is φ = 211842192.

The previous prime is 211842181. The next prime is 211842199. The reversal of 211842193 is 391248112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113891584 + 97950609 = 10672^2 + 9897^2 .

It is a cyclic number.

It is not a de Polignac number, because 211842193 - 2¹³ = 211834001 is a prime.

It is a super-2 number, since 2×211842193² = 89754229470098498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211842199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105921096 + 105921097.

It is an arithmetic number, because the mean of its divisors is an integer number (105921097).

Almost surely, 2^211842193 is an apocalyptic number.

It is an amenable number.

211842193 is a deficient number, since it is larger than the sum of its proper divisors (1).

211842193 is an equidigital number, since it uses as much as digits as its factorization.

211842193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 211842193 is about 14554.7996550966. The cubic root of 211842193 is about 596.1252092313.

The spelling of 211842193 in words is "two hundred eleven million, eight hundred forty-two thousand, one hundred ninety-three".