211242433 has 4 divisors (see below), whose sum is σ = 211277700. Its totient is φ = 211207168.

The previous prime is 211242407. The next prime is 211242469. The reversal of 211242433 is 334242112.

211242433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2930944 + 208311489 = 1712^2 + 14433^2 .

It is a cyclic number.

It is not a de Polignac number, because 211242433 - 2¹⁷ = 211111361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211242403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6160 + ... + 21457.

It is an arithmetic number, because the mean of its divisors is an integer number (52819425).

Almost surely, 2^211242433 is an apocalyptic number.

It is an amenable number.

211242433 is a deficient number, since it is larger than the sum of its proper divisors (35267).

211242433 is an equidigital number, since it uses as much as digits as its factorization.

211242433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35266.

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

The square root of 211242433 is about 14534.1815387039. The cubic root of 211242433 is about 595.5621013934.

Adding to 211242433 its reverse (334242112), we get a palindrome (545484545).

The spelling of 211242433 in words is "two hundred eleven million, two hundred forty-two thousand, four hundred thirty-three".