218309041 has 2 divisors, whose sum is σ = 218309042. Its totient is φ = 218309040.

The previous prime is 218309029. The next prime is 218309081. The reversal of 218309041 is 140903812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193349025 + 24960016 = 13905^2 + 4996^2 .

It is a cyclic number.

It is not a de Polignac number, because 218309041 - 2¹⁵ = 218276273 is a prime.

It is not a weakly prime, because it can be changed into another prime (218309081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109154520 + 109154521.

It is an arithmetic number, because the mean of its divisors is an integer number (109154521).

Almost surely, 2^218309041 is an apocalyptic number.

It is an amenable number.

218309041 is a deficient number, since it is larger than the sum of its proper divisors (1).

218309041 is an equidigital number, since it uses as much as digits as its factorization.

218309041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 218309041 is about 14775.2848026696. The cubic root of 218309041 is about 602.1304274377.

The spelling of 218309041 in words is "two hundred eighteen million, three hundred nine thousand, forty-one".