1818222 has 16 divisors (see below), whose sum is σ = 4156032. Its totient is φ = 519480.

The previous prime is 1818221. The next prime is 1818233. The reversal of 1818222 is 2228181.

It is a junction number, because it is equal to n+sod(n) for n = 1818192 and 1818201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818221) 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, 21604 + ... + 21687.

It is an arithmetic number, because the mean of its divisors is an integer number (259752).

2^1818222 is an apocalyptic number.

1818222 is an abundant number, since it is smaller than the sum of its proper divisors (2337810).

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

1818222 is a wasteful number, since it uses less digits than its factorization.

1818222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43303.

The product of its digits is 512, while the sum is 24.

The square root of 1818222 is about 1348.4146246611. The cubic root of 1818222 is about 122.0531435586.

It can be divided in two parts, 18182 and 22, that multiplied together give a palindrome (400004).

The spelling of 1818222 in words is "one million, eight hundred eighteen thousand, two hundred twenty-two".