208224901 has 4 divisors (see below), whose sum is σ = 215405100. Its totient is φ = 201044704.

The previous prime is 208224871. The next prime is 208224943. The reversal of 208224901 is 109422802.

It is a Cunningham number, because it is equal to 14430²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109422802 = 2 ⋅54711401.

It can be written as a sum of positive squares in 2 ways, for example, as 109202500 + 99022401 = 10450^2 + 9951^2 .

It is not a de Polignac number, because 208224901 - 2⁵ = 208224869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208224901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208224001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3590056 + ... + 3590113.

It is an arithmetic number, because the mean of its divisors is an integer number (53851275).

Almost surely, 2^208224901 is an apocalyptic number.

It is an amenable number.

208224901 is a deficient number, since it is larger than the sum of its proper divisors (7180199).

208224901 is an equidigital number, since it uses as much as digits as its factorization.

208224901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7180198.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 208224901 is about 14430.0000346500. Note that the first 4 decimals coincide. The cubic root of 208224901 is about 592.7126843024.

The spelling of 208224901 in words is "two hundred eight million, two hundred twenty-four thousand, nine hundred one".