206245251011 has 2 divisors, whose sum is σ = 206245251012. Its totient is φ = 206245251010.

The previous prime is 206245250989. The next prime is 206245251049. The reversal of 206245251011 is 110152542602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206245251011 is a prime.

It is not a weakly prime, because it can be changed into another prime (206245251071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103122625505 + 103122625506.

It is an arithmetic number, because the mean of its divisors is an integer number (103122625506).

Almost surely, 2^206245251011 is an apocalyptic number.

206245251011 is a deficient number, since it is larger than the sum of its proper divisors (1).

206245251011 is an equidigital number, since it uses as much as digits as its factorization.

206245251011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 206245251011 its reverse (110152542602), we get a palindrome (316397793613).

The spelling of 206245251011 in words is "two hundred six billion, two hundred forty-five million, two hundred fifty-one thousand, eleven".