218074499 has 2 divisors, whose sum is σ = 218074500. Its totient is φ = 218074498.

The previous prime is 218074471. The next prime is 218074517. The reversal of 218074499 is 994470812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218074499 - 2¹⁶ = 218008963 is a prime.

It is a super-2 number, since 2×218074499² = 95112974228202002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (218074399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109037249 + 109037250.

It is an arithmetic number, because the mean of its divisors is an integer number (109037250).

Almost surely, 2^218074499 is an apocalyptic number.

218074499 is a deficient number, since it is larger than the sum of its proper divisors (1).

218074499 is an equidigital number, since it uses as much as digits as its factorization.

218074499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 218074499 is about 14767.3456992108. The cubic root of 218074499 is about 601.9147156809.

The spelling of 218074499 in words is "two hundred eighteen million, seventy-four thousand, four hundred ninety-nine".