208070281 has 2 divisors, whose sum is σ = 208070282. Its totient is φ = 208070280.

The previous prime is 208070267. The next prime is 208070287. The reversal of 208070281 is 182070802.

208070281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137241225 + 70829056 = 11715^2 + 8416^2 .

It is a cyclic number.

It is not a de Polignac number, because 208070281 - 2⁹ = 208069769 is a prime.

It is a super-2 number, since 2×208070281² = 86586483670837922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208070287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104035140 + 104035141.

It is an arithmetic number, because the mean of its divisors is an integer number (104035141).

Almost surely, 2^208070281 is an apocalyptic number.

It is an amenable number.

208070281 is a deficient number, since it is larger than the sum of its proper divisors (1).

208070281 is an equidigital number, since it uses as much as digits as its factorization.

208070281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 208070281 is about 14424.6414513498. The cubic root of 208070281 is about 592.5659392392.

It can be divided in two parts, 2080 and 70281, that added together give a square (72361 = 269²).

The spelling of 208070281 in words is "two hundred eight million, seventy thousand, two hundred eighty-one".