211242303 has 8 divisors (see below), whose sum is σ = 312951600. Its totient is φ = 140828184.

The previous prime is 211242271. The next prime is 211242307. The reversal of 211242303 is 303242112.

It is not a de Polignac number, because 211242303 - 2⁵ = 211242271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3911868 + ... + 3911921.

It is an arithmetic number, because the mean of its divisors is an integer number (39118950).

Almost surely, 2^211242303 is an apocalyptic number.

211242303 is a deficient number, since it is larger than the sum of its proper divisors (101709297).

211242303 is an equidigital number, since it uses as much as digits as its factorization.

211242303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823798 (or 7823792 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 211242303 is about 14534.1770664871. The cubic root of 211242303 is about 595.5619792224.

Adding to 211242303 its reverse (303242112), we get a palindrome (514484415).

The spelling of 211242303 in words is "two hundred eleven million, two hundred forty-two thousand, three hundred three".