9021218 has 16 divisors (see below), whose sum is σ = 13932000. Its totient is φ = 4379232.

The previous prime is 9021211. The next prime is 9021223. The reversal of 9021218 is 8121209.

It is a junction number, because it is equal to n+sod(n) for n = 9021193 and 9021202.

It is not an unprimeable number, because it can be changed into a prime (9021211) 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, 10073 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (870750).

Almost surely, 2^9021218 is an apocalyptic number.

9021218 is a deficient number, since it is larger than the sum of its proper divisors (4910782).

9021218 is a wasteful number, since it uses less digits than its factorization.

9021218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 9021218 is about 3003.5342515110. The cubic root of 9021218 is about 208.1717177873.

Subtracting from 9021218 its reverse (8121209), we obtain a palindrome (900009).

The spelling of 9021218 in words is "nine million, twenty-one thousand, two hundred eighteen".