207216105 has 16 divisors (see below), whose sum is σ = 333535104. Its totient is φ = 109852160.

The previous prime is 207216103. The next prime is 207216133. The reversal of 207216105 is 501612702.

It is not a de Polignac number, because 207216105 - 2¹ = 207216103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207216103) 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 15 ways as a sum of consecutive naturals, for example, 38856 + ... + 43865.

It is an arithmetic number, because the mean of its divisors is an integer number (20845944).

Almost surely, 2^207216105 is an apocalyptic number.

It is an amenable number.

207216105 is a deficient number, since it is larger than the sum of its proper divisors (126318999).

207216105 is a wasteful number, since it uses less digits than its factorization.

207216105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82896.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 207216105 is about 14395.0027787424. The cubic root of 207216105 is about 591.7539542802.

Adding to 207216105 its reverse (501612702), we get a palindrome (708828807).

The spelling of 207216105 in words is "two hundred seven million, two hundred sixteen thousand, one hundred five".