65005211 has 4 divisors (see below), whose sum is σ = 67246800. Its totient is φ = 62763624.

The previous prime is 65005201. The next prime is 65005217. The reversal of 65005211 is 11250056.

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 65005211 - 2⁶ = 65005147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65005217) 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, 1120751 + ... + 1120808.

It is an arithmetic number, because the mean of its divisors is an integer number (16811700).

Almost surely, 2^65005211 is an apocalyptic number.

65005211 is a deficient number, since it is larger than the sum of its proper divisors (2241589).

65005211 is a wasteful number, since it uses less digits than its factorization.

65005211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241588.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 65005211 is about 8062.5809143227. The cubic root of 65005211 is about 402.0833201882.

Adding to 65005211 its reverse (11250056), we get a palindrome (76255267).

It can be divided in two parts, 6500 and 5211, that added together give a palindrome (11711).

The spelling of 65005211 in words is "sixty-five million, five thousand, two hundred eleven".