211740241 has 2 divisors, whose sum is σ = 211740242. Its totient is φ = 211740240.

The previous prime is 211740227. The next prime is 211740251. The reversal of 211740241 is 142047112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163840000 + 47900241 = 12800^2 + 6921^2 .

It is a cyclic number.

It is not a de Polignac number, because 211740241 - 2¹⁷ = 211609169 is a prime.

It is not a weakly prime, because it can be changed into another prime (211740251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105870120 + 105870121.

It is an arithmetic number, because the mean of its divisors is an integer number (105870121).

Almost surely, 2^211740241 is an apocalyptic number.

It is an amenable number.

211740241 is a deficient number, since it is larger than the sum of its proper divisors (1).

211740241 is an equidigital number, since it uses as much as digits as its factorization.

211740241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 211740241 is about 14551.2968837832. The cubic root of 211740241 is about 596.0295627049.

Adding to 211740241 its reverse (142047112), we get a palindrome (353787353).

The spelling of 211740241 in words is "two hundred eleven million, seven hundred forty thousand, two hundred forty-one".