2218671 has 60 divisors (see below), whose sum is σ = 4248552. Its totient is φ = 1143072.

The previous prime is 2218669. The next prime is 2218691. The reversal of 2218671 is 1768122.

2218671 is a nontrivial binomial coefficient, being equal to C(2107, 2).

It is not a de Polignac number, because 2218671 - 2¹ = 2218669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 51576 + ... + 51618.

2^2218671 is an apocalyptic number.

2218671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2218671 is the 2106-th triangular number.

2218671 is a deficient number, since it is larger than the sum of its proper divisors (2029881).

2218671 is a wasteful number, since it uses less digits than its factorization.

2218671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 66 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2218671 is about 1489.5203926096. The cubic root of 2218671 is about 130.4260381529.

The spelling of 2218671 in words is "two million, two hundred eighteen thousand, six hundred seventy-one".