218244077533 has 2 divisors, whose sum is σ = 218244077534. Its totient is φ = 218244077532.

The previous prime is 218244077507. The next prime is 218244077549. The reversal of 218244077533 is 335770442812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163505392164 + 54738685369 = 404358^2 + 233963^2 .

It is a cyclic number.

It is not a de Polignac number, because 218244077533 - 2⁹ = 218244077021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218244077033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109122038766 + 109122038767.

It is an arithmetic number, because the mean of its divisors is an integer number (109122038767).

Almost surely, 2^218244077533 is an apocalyptic number.

It is an amenable number.

218244077533 is a deficient number, since it is larger than the sum of its proper divisors (1).

218244077533 is an equidigital number, since it uses as much as digits as its factorization.

218244077533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 218244077533 in words is "two hundred eighteen billion, two hundred forty-four million, seventy-seven thousand, five hundred thirty-three".