65865213 has 12 divisors (see below), whose sum is σ = 95348448. Its totient is φ = 43813320.

The previous prime is 65865197. The next prime is 65865227. The reversal of 65865213 is 31256856.

It is not a de Polignac number, because 65865213 - 2⁴ = 65865197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65865253) 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 in 11 ways as a sum of consecutive naturals, for example, 3633 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (7945704).

Almost surely, 2^65865213 is an apocalyptic number.

It is an amenable number.

65865213 is a deficient number, since it is larger than the sum of its proper divisors (29483235).

65865213 is a wasteful number, since it uses less digits than its factorization.

65865213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16144 (or 16141 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 65865213 is about 8115.7385985504. The cubic root of 65865213 is about 403.8487102214.

The spelling of 65865213 in words is "sixty-five million, eight hundred sixty-five thousand, two hundred thirteen".