65564213 has 12 divisors (see below), whose sum is σ = 77611884. Its totient is φ = 55017600.

The previous prime is 65564209. The next prime is 65564221. The reversal of 65564213 is 31246556.

It can be written as a sum of positive squares in 2 ways, for example, as 32467204 + 33097009 = 5698^2 + 5753^2 .

It is not a de Polignac number, because 65564213 - 2² = 65564209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65564213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65564243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19268 + ... + 22413.

It is an arithmetic number, because the mean of its divisors is an integer number (6467657).

Almost surely, 2^65564213 is an apocalyptic number.

It is an amenable number.

65564213 is a deficient number, since it is larger than the sum of its proper divisors (12047671).

65564213 is a wasteful number, since it uses less digits than its factorization.

65564213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41716 (or 41705 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 65564213 is about 8097.1731486983. The cubic root of 65564213 is about 403.2325827323.

The spelling of 65564213 in words is "sixty-five million, five hundred sixty-four thousand, two hundred thirteen".