2218547 has 2 divisors, whose sum is σ = 2218548. Its totient is φ = 2218546.

The previous prime is 2218523. The next prime is 2218549. The reversal of 2218547 is 7458122.

2218547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218547 is a prime.

Together with 2218549, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₁₆₃₉₂₈ and since 2218547 and 163928 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2218549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109273 + 1109274.

It is an arithmetic number, because the mean of its divisors is an integer number (1109274).

2^2218547 is an apocalyptic number.

2218547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218547 is an equidigital number, since it uses as much as digits as its factorization.

2218547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 29.

The square root of 2218547 is about 1489.4787678916. The cubic root of 2218547 is about 130.4236083004.

The spelling of 2218547 in words is "two million, two hundred eighteen thousand, five hundred forty-seven".