211042231 has 2 divisors, whose sum is σ = 211042232. Its totient is φ = 211042230.

The previous prime is 211042207. The next prime is 211042243. The reversal of 211042231 is 132240112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211042231 - 2¹¹ = 211040183 is a prime.

It is a super-2 number, since 2×211042231² = 89077646530914722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211042261) 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 as a sum of consecutive naturals, namely, 105521115 + 105521116.

It is an arithmetic number, because the mean of its divisors is an integer number (105521116).

Almost surely, 2^211042231 is an apocalyptic number.

211042231 is a deficient number, since it is larger than the sum of its proper divisors (1).

211042231 is an equidigital number, since it uses as much as digits as its factorization.

211042231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211042231 is about 14527.2926245739. The cubic root of 211042231 is about 595.3738967652.

Adding to 211042231 its reverse (132240112), we get a palindrome (343282343).

The spelling of 211042231 in words is "two hundred eleven million, forty-two thousand, two hundred thirty-one".