218830819 has 2 divisors, whose sum is σ = 218830820. Its totient is φ = 218830818.

The previous prime is 218830811. The next prime is 218830849. The reversal of 218830819 is 918038812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218830819 - 2³ = 218830811 is a prime.

It is a super-2 number, since 2×218830819² = 95773854688421522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (218830811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109415409 + 109415410.

It is an arithmetic number, because the mean of its divisors is an integer number (109415410).

Almost surely, 2^218830819 is an apocalyptic number.

218830819 is a deficient number, since it is larger than the sum of its proper divisors (1).

218830819 is an equidigital number, since it uses as much as digits as its factorization.

218830819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 218830819 is about 14792.9313863074. The cubic root of 218830819 is about 602.6097608264.

The spelling of 218830819 in words is "two hundred eighteen million, eight hundred thirty thousand, eight hundred nineteen".