1822216 has 16 divisors (see below), whose sum is σ = 3727440. Its totient is φ = 828240.

The previous prime is 1822207. The next prime is 1822217. The reversal of 1822216 is 6122281.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1822217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10266 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (232965).

2^1822216 is an apocalyptic number.

It is an amenable number.

1822216 is an abundant number, since it is smaller than the sum of its proper divisors (1905224).

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

1822216 is a wasteful number, since it uses less digits than its factorization.

1822216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20724 (or 20720 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 1822216 is about 1349.8948107167. The cubic root of 1822216 is about 122.1424476056.

1822216 divided by its sum of digits (22) gives a palindrome (82828).

Adding to 1822216 its reverse (6122281), we get a palindrome (7944497).

The spelling of 1822216 in words is "one million, eight hundred twenty-two thousand, two hundred sixteen".