208541875021 has 8 divisors (see below), whose sum is σ = 224622828320. Its totient is φ = 192971428272.

The previous prime is 208541875007. The next prime is 208541875039. The reversal of 208541875021 is 120578145802.

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 208541875021 - 2³¹ = 206394391373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208541875051) 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 7 ways as a sum of consecutive naturals, for example, 127625790 + ... + 127627423.

It is an arithmetic number, because the mean of its divisors is an integer number (28077853540).

Almost surely, 2^208541875021 is an apocalyptic number.

It is an amenable number.

208541875021 is a deficient number, since it is larger than the sum of its proper divisors (16080953299).

208541875021 is a wasteful number, since it uses less digits than its factorization.

208541875021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255253275.

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 208541875021 in words is "two hundred eight billion, five hundred forty-one million, eight hundred seventy-five thousand, twenty-one".