206053556251 has 2 divisors, whose sum is σ = 206053556252. Its totient is φ = 206053556250.

The previous prime is 206053556249. The next prime is 206053556347. The reversal of 206053556251 is 152655350602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206053556251 - 2¹ = 206053556249 is a prime.

Together with 206053556249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (206053586251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103026778125 + 103026778126.

It is an arithmetic number, because the mean of its divisors is an integer number (103026778126).

Almost surely, 2^206053556251 is an apocalyptic number.

206053556251 is a deficient number, since it is larger than the sum of its proper divisors (1).

206053556251 is an equidigital number, since it uses as much as digits as its factorization.

206053556251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 206053556251 in words is "two hundred six billion, fifty-three million, five hundred fifty-six thousand, two hundred fifty-one".