206936281 has 2 divisors, whose sum is σ = 206936282. Its totient is φ = 206936280.

The previous prime is 206936273. The next prime is 206936309. The reversal of 206936281 is 182639602.

206936281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106936281 + 100000000 = 10341^2 + 10000^2 .

It is a cyclic number.

It is not a de Polignac number, because 206936281 - 2³ = 206936273 is a prime.

It is a super-2 number, since 2×206936281² = 85645248788221922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206936281.

It is not a weakly prime, because it can be changed into another prime (206906281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103468140 + 103468141.

It is an arithmetic number, because the mean of its divisors is an integer number (103468141).

Almost surely, 2^206936281 is an apocalyptic number.

It is an amenable number.

206936281 is a deficient number, since it is larger than the sum of its proper divisors (1).

206936281 is an equidigital number, since it uses as much as digits as its factorization.

206936281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 206936281 is about 14385.2800111781. The cubic root of 206936281 is about 591.4874667075.

The spelling of 206936281 in words is "two hundred six million, nine hundred thirty-six thousand, two hundred eighty-one".