211041065 has 4 divisors (see below), whose sum is σ = 253249284. Its totient is φ = 168832848.

The previous prime is 211041023. The next prime is 211041079. The reversal of 211041065 is 560140112.

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 65983129 + 145057936 = 8123^2 + 12044^2 .

It is a cyclic number.

It is not a de Polignac number, because 211041065 - 2¹⁸ = 210778921 is a prime.

It is a super-2 number, since 2×211041065² = 89076662232668450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21104102 + ... + 21104111.

It is an arithmetic number, because the mean of its divisors is an integer number (63312321).

Almost surely, 2^211041065 is an apocalyptic number.

It is an amenable number.

211041065 is a deficient number, since it is larger than the sum of its proper divisors (42208219).

211041065 is an equidigital number, since it uses as much as digits as its factorization.

211041065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42208218.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 211041065 is about 14527.2524931592. The cubic root of 211041065 is about 595.3728002907.

Adding to 211041065 its reverse (560140112), we get a palindrome (771181177).

The spelling of 211041065 in words is "two hundred eleven million, forty-one thousand, sixty-five".