206454422281 has 2 divisors, whose sum is σ = 206454422282. Its totient is φ = 206454422280.

The previous prime is 206454422177. The next prime is 206454422297. The reversal of 206454422281 is 182224454602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205518062281 + 936360000 = 453341^2 + 30600^2 .

It is a cyclic number.

It is not a de Polignac number, because 206454422281 - 2²⁹ = 205917551369 is a prime.

It is a super-2 number, since 2×206454422281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206454422981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103227211140 + 103227211141.

It is an arithmetic number, because the mean of its divisors is an integer number (103227211141).

Almost surely, 2^206454422281 is an apocalyptic number.

It is an amenable number.

206454422281 is a deficient number, since it is larger than the sum of its proper divisors (1).

206454422281 is an equidigital number, since it uses as much as digits as its factorization.

206454422281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 40.

Adding to 206454422281 its reverse (182224454602), we get a palindrome (388678876883).

The spelling of 206454422281 in words is "two hundred six billion, four hundred fifty-four million, four hundred twenty-two thousand, two hundred eighty-one".