2218071 has 8 divisors (see below), whose sum is σ = 3020544. Its totient is φ = 1447160.

The previous prime is 2218067. The next prime is 2218091. The reversal of 2218071 is 1708122.

2218071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2218071 - 2² = 2218067 is a prime.

It is a super-2 number, since 2×2218071² = 9839677922082, which contains 22 as substring.

It is an Ulam number.

2218071 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218001) 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 in 7 ways as a sum of consecutive naturals, for example, 7725 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (377568).

2^2218071 is an apocalyptic number.

2218071 is a deficient number, since it is larger than the sum of its proper divisors (802473).

2218071 is a wasteful number, since it uses less digits than its factorization.

2218071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15781.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 2218071 is about 1489.3189718794. The cubic root of 2218071 is about 130.4142799610.

The spelling of 2218071 in words is "two million, two hundred eighteen thousand, seventy-one".