2218663 has 2 divisors, whose sum is σ = 2218664. Its totient is φ = 2218662.

The previous prime is 2218621. The next prime is 2218669. The reversal of 2218663 is 3668122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109331 + 1109332.

It is an arithmetic number, because the mean of its divisors is an integer number (1109332).

2^2218663 is an apocalyptic number.

2218663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218663 is an equidigital number, since it uses as much as digits as its factorization.

2218663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 2218663 is about 1489.5177071791. The cubic root of 2218663 is about 130.4258813910.

The spelling of 2218663 in words is "two million, two hundred eighteen thousand, six hundred sixty-three".