16218259 has 2 divisors, whose sum is σ = 16218260. Its totient is φ = 16218258.

The previous prime is 16218227. The next prime is 16218263. The reversal of 16218259 is 95281261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16218259 - 2⁵ = 16218227 is a prime.

It is not a weakly prime, because it can be changed into another prime (16218269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109129 + 8109130.

It is an arithmetic number, because the mean of its divisors is an integer number (8109130).

Almost surely, 2^16218259 is an apocalyptic number.

16218259 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218259 is an equidigital number, since it uses as much as digits as its factorization.

16218259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 16218259 is about 4027.1899632374. The cubic root of 16218259 is about 253.1248270892.

The spelling of 16218259 in words is "sixteen million, two hundred eighteen thousand, two hundred fifty-nine".