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208441121 = 729777303
BaseRepresentation
bin11000110110010…
…00111100100001
3112112012220110112
430123020330201
5411330103441
632403341105
75110502030
oct1433107441
9475186415
10208441121
11a7728999
1259981795
1334251455
141d97c717
15134754eb
hexc6c8f21

208441121 has 4 divisors (see below), whose sum is σ = 238218432. Its totient is φ = 178663812.

The previous prime is 208441109. The next prime is 208441133. The reversal of 208441121 is 121144802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121144802 = 260572401.

It is an interprime number because it is at equal distance from previous prime (208441109) and next prime (208441133).

It is a cyclic number.

It is not a de Polignac number, because 208441121 - 218 = 208178977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (208441621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14888645 + ... + 14888658.

It is an arithmetic number, because the mean of its divisors is an integer number (59554608).

Almost surely, 2208441121 is an apocalyptic number.

It is an amenable number.

208441121 is a deficient number, since it is larger than the sum of its proper divisors (29777311).

208441121 is an equidigital number, since it uses as much as digits as its factorization.

208441121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29777310.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 208441121 is about 14437.4901212087. The cubic root of 208441121 is about 592.9177702495.

Adding to 208441121 its reverse (121144802), we get a palindrome (329585923).

The spelling of 208441121 in words is "two hundred eight million, four hundred forty-one thousand, one hundred twenty-one".

Divisors: 1 7 29777303 208441121