2215218 has 16 divisors (see below), whose sum is σ = 4455936. Its totient is φ = 734160.

The previous prime is 2215217. The next prime is 2215237. The reversal of 2215218 is 8125122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2215194 and 2215203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180 + ... + 2112.

It is an arithmetic number, because the mean of its divisors is an integer number (278496).

2^2215218 is an apocalyptic number.

2215218 is an abundant number, since it is smaller than the sum of its proper divisors (2240718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2215218 is a wasteful number, since it uses less digits than its factorization.

2215218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129.

The product of its digits is 320, while the sum is 21.

The square root of 2215218 is about 1488.3608433441. The cubic root of 2215218 is about 130.3583407266.

The spelling of 2215218 in words is "two million, two hundred fifteen thousand, two hundred eighteen".