218266051 has 2 divisors, whose sum is σ = 218266052. Its totient is φ = 218266050.

The previous prime is 218266049. The next prime is 218266063. The reversal of 218266051 is 150662812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218266051 - 2¹ = 218266049 is a prime.

Together with 218266049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (218266351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109133025 + 109133026.

It is an arithmetic number, because the mean of its divisors is an integer number (109133026).

Almost surely, 2^218266051 is an apocalyptic number.

218266051 is a deficient number, since it is larger than the sum of its proper divisors (1).

218266051 is an equidigital number, since it uses as much as digits as its factorization.

218266051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 218266051 is about 14773.8299367496. The cubic root of 218266051 is about 602.0909004651.

The spelling of 218266051 in words is "two hundred eighteen million, two hundred sixty-six thousand, fifty-one".