2218999 has 2 divisors, whose sum is σ = 2219000. Its totient is φ = 2218998.

The previous prime is 2218969. The next prime is 2219023. The reversal of 2218999 is 9998122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2218999 - 2⁵ = 2218967 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109499 + 1109500.

It is an arithmetic number, because the mean of its divisors is an integer number (1109500).

2^2218999 is an apocalyptic number.

2218999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218999 is an equidigital number, since it uses as much as digits as its factorization.

2218999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 2218999 is about 1489.6304910950. The cubic root of 2218999 is about 130.4324650683.

The spelling of 2218999 in words is "two million, two hundred eighteen thousand, nine hundred ninety-nine".