218485361 has 2 divisors, whose sum is σ = 218485362. Its totient is φ = 218485360.

The previous prime is 218485331. The next prime is 218485369. The reversal of 218485361 is 163584812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 8814961 = 14480^2 + 2969^2 .

It is a cyclic number.

It is not a de Polignac number, because 218485361 - 2¹⁸ = 218223217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (218485369) 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, 109242680 + 109242681.

It is an arithmetic number, because the mean of its divisors is an integer number (109242681).

Almost surely, 2^218485361 is an apocalyptic number.

It is an amenable number.

218485361 is a deficient number, since it is larger than the sum of its proper divisors (1).

218485361 is an equidigital number, since it uses as much as digits as its factorization.

218485361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The square root of 218485361 is about 14781.2503192389. The cubic root of 218485361 is about 602.2924898466.

The spelling of 218485361 in words is "two hundred eighteen million, four hundred eighty-five thousand, three hundred sixty-one".