212000065 has 8 divisors (see below), whose sum is σ = 254537640. Its totient is φ = 169508352.

The previous prime is 212000057. The next prime is 212000099. The reversal of 212000065 is 560000212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 91527489 + 120472576 = 9567^2 + 10976^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212000065 - 2³ = 212000057 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 304 + ... + 20593.

It is an arithmetic number, because the mean of its divisors is an integer number (31817205).

Almost surely, 2^212000065 is an apocalyptic number.

It is an amenable number.

212000065 is a deficient number, since it is larger than the sum of its proper divisors (42537575).

212000065 is a wasteful number, since it uses less digits than its factorization.

212000065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22931.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 212000065 is about 14560.2220106700. Note that the first 3 decimals coincide. The cubic root of 212000065 is about 596.2732567142.

Adding to 212000065 its reverse (560000212), we get a palindrome (772000277).

The spelling of 212000065 in words is "two hundred twelve million, sixty-five", and thus it is an aban number.