208821151 has 16 divisors (see below), whose sum is σ = 261036288. Its totient is φ = 162288000.

The previous prime is 208821139. The next prime is 208821157. The reversal of 208821151 is 151128802.

It is not a de Polignac number, because 208821151 - 2¹¹ = 208819103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208821157) 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, 27496 + ... + 34258.

It is an arithmetic number, because the mean of its divisors is an integer number (16314768).

Almost surely, 2^208821151 is an apocalyptic number.

208821151 is a deficient number, since it is larger than the sum of its proper divisors (52215137).

208821151 is a wasteful number, since it uses less digits than its factorization.

208821151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 208821151 is about 14450.6453489109. The cubic root of 208821151 is about 593.2778875162.

Adding to 208821151 its reverse (151128802), we get a palindrome (359949953).

The spelling of 208821151 in words is "two hundred eight million, eight hundred twenty-one thousand, one hundred fifty-one".