65011211 has 4 divisors (see below), whose sum is σ = 65297832. Its totient is φ = 64724592.

The previous prime is 65011201. The next prime is 65011223. The reversal of 65011211 is 11211056.

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

It is a cyclic number.

It is not a de Polignac number, because 65011211 - 2⁶ = 65011147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65011211.

It is not an unprimeable number, because it can be changed into a prime (65011201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142970 + ... + 143423.

It is an arithmetic number, because the mean of its divisors is an integer number (16324458).

Almost surely, 2^65011211 is an apocalyptic number.

65011211 is a deficient number, since it is larger than the sum of its proper divisors (286621).

65011211 is a wasteful number, since it uses less digits than its factorization.

65011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286620.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 65011211 is about 8062.9529950261. The cubic root of 65011211 is about 402.0956906103.

Adding to 65011211 its reverse (11211056), we get a palindrome (76222267).

The spelling of 65011211 in words is "sixty-five million, eleven thousand, two hundred eleven".