206213351243 has 2 divisors, whose sum is σ = 206213351244. Its totient is φ = 206213351242.

The previous prime is 206213351231. The next prime is 206213351437. The reversal of 206213351243 is 342153312602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206213351243 - 2²² = 206209156939 is a prime.

It is not a weakly prime, because it can be changed into another prime (206213351143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103106675621 + 103106675622.

It is an arithmetic number, because the mean of its divisors is an integer number (103106675622).

Almost surely, 2^206213351243 is an apocalyptic number.

206213351243 is a deficient number, since it is larger than the sum of its proper divisors (1).

206213351243 is an equidigital number, since it uses as much as digits as its factorization.

206213351243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 206213351243 its reverse (342153312602), we get a palindrome (548366663845).

The spelling of 206213351243 in words is "two hundred six billion, two hundred thirteen million, three hundred fifty-one thousand, two hundred forty-three".