208216073 has 4 divisors (see below), whose sum is σ = 224232708. Its totient is φ = 192199440.

The previous prime is 208216067. The next prime is 208216093. The reversal of 208216073 is 370612802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101445184 + 106770889 = 10072^2 + 10333^2 .

It is a cyclic number.

It is not a de Polignac number, because 208216073 - 2⁶ = 208216009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208216093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8008298 + ... + 8008323.

It is an arithmetic number, because the mean of its divisors is an integer number (56058177).

Almost surely, 2^208216073 is an apocalyptic number.

It is an amenable number.

208216073 is a deficient number, since it is larger than the sum of its proper divisors (16016635).

208216073 is a wasteful number, since it uses less digits than its factorization.

208216073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16016634.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 208216073 is about 14429.6941409026. The cubic root of 208216073 is about 592.7043078762.

Adding to 208216073 its reverse (370612802), we get a palindrome (578828875).

The spelling of 208216073 in words is "two hundred eight million, two hundred sixteen thousand, seventy-three".