65212117 has 2 divisors, whose sum is σ = 65212118. Its totient is φ = 65212116.

The previous prime is 65212109. The next prime is 65212159. The reversal of 65212117 is 71121256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42497361 + 22714756 = 6519^2 + 4766^2 .

It is a cyclic number.

It is not a de Polignac number, because 65212117 - 2³ = 65212109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65212091 and 65212100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65212817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32606058 + 32606059.

It is an arithmetic number, because the mean of its divisors is an integer number (32606059).

Almost surely, 2^65212117 is an apocalyptic number.

It is an amenable number.

65212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

65212117 is an equidigital number, since it uses as much as digits as its factorization.

65212117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 65212117 is about 8075.4019714191. The cubic root of 65212117 is about 402.5094672619.

It can be divided in two parts, 652 and 12117, that added together give a square (12769 = 113²).

The spelling of 65212117 in words is "sixty-five million, two hundred twelve thousand, one hundred seventeen".