211342243 has 6 divisors (see below), whose sum is σ = 245847156. Its totient is φ = 181150452.

The previous prime is 211342237. The next prime is 211342267. The reversal of 211342243 is 342243112.

211342243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211342243 - 2⁵ = 211342211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211342273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2156505 + ... + 2156602.

It is an arithmetic number, because the mean of its divisors is an integer number (40974526).

Almost surely, 2^211342243 is an apocalyptic number.

211342243 is a deficient number, since it is larger than the sum of its proper divisors (34504913).

211342243 is an equidigital number, since it uses as much as digits as its factorization.

211342243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313121 (or 4313114 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 211342243 is about 14537.6147630896. The cubic root of 211342243 is about 595.6558857290.

Adding to 211342243 its reverse (342243112), we get a palindrome (553585355).

The spelling of 211342243 in words is "two hundred eleven million, three hundred forty-two thousand, two hundred forty-three".