1816222 has 8 divisors (see below), whose sum is σ = 2730672. Its totient is φ = 906000.

The previous prime is 1816211. The next prime is 1816237. The reversal of 1816222 is 2226181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1816193 and 1816202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447 + ... + 1957.

It is an arithmetic number, because the mean of its divisors is an integer number (341334).

2^1816222 is an apocalyptic number.

1816222 is a deficient number, since it is larger than the sum of its proper divisors (914450).

1816222 is a wasteful number, since it uses less digits than its factorization.

1816222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114.

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

The square root of 1816222 is about 1347.6728089562. The cubic root of 1816222 is about 122.0083753096.

The spelling of 1816222 in words is "one million, eight hundred sixteen thousand, two hundred twenty-two".