208118143 has 2 divisors, whose sum is σ = 208118144. Its totient is φ = 208118142.

The previous prime is 208118137. The next prime is 208118149. The reversal of 208118143 is 341811802.

It is a balanced prime because it is at equal distance from previous prime (208118137) and next prime (208118149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208118143 is a prime.

It is a super-2 number, since 2×208118143² = 86626322891536898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208118149) 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 as a sum of consecutive naturals, namely, 104059071 + 104059072.

It is an arithmetic number, because the mean of its divisors is an integer number (104059072).

Almost surely, 2^208118143 is an apocalyptic number.

208118143 is a deficient number, since it is larger than the sum of its proper divisors (1).

208118143 is an equidigital number, since it uses as much as digits as its factorization.

208118143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 208118143 is about 14426.3003919924. The cubic root of 208118143 is about 592.6113713508.

Adding to 208118143 its reverse (341811802), we get a palindrome (549929945).

The spelling of 208118143 in words is "two hundred eight million, one hundred eighteen thousand, one hundred forty-three".