218358097 has 2 divisors, whose sum is σ = 218358098. Its totient is φ = 218358096.

The previous prime is 218358083. The next prime is 218358121. The reversal of 218358097 is 790853812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154853136 + 63504961 = 12444^2 + 7969^2 .

It is a cyclic number.

It is not a de Polignac number, because 218358097 - 2⁷ = 218357969 is a prime.

It is a super-3 number, since 3×218358097³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (218358397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109179048 + 109179049.

It is an arithmetic number, because the mean of its divisors is an integer number (109179049).

Almost surely, 2^218358097 is an apocalyptic number.

It is an amenable number.

218358097 is a deficient number, since it is larger than the sum of its proper divisors (1).

218358097 is an equidigital number, since it uses as much as digits as its factorization.

218358097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 218358097 is about 14776.9447789453. The cubic root of 218358097 is about 602.1755254295.

The spelling of 218358097 in words is "two hundred eighteen million, three hundred fifty-eight thousand, ninety-seven".