1813216 has 12 divisors (see below), whose sum is σ = 3569832. Its totient is φ = 906592.

The previous prime is 1813211. The next prime is 1813219. The reversal of 1813216 is 6123181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28300 + ... + 28363.

It is an arithmetic number, because the mean of its divisors is an integer number (297486).

2^1813216 is an apocalyptic number.

1813216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1813216 is a deficient number, since it is larger than the sum of its proper divisors (1756616).

1813216 is an equidigital number, since it uses as much as digits as its factorization.

1813216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56673 (or 56665 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 1813216 is about 1346.5570912516. The cubic root of 1813216 is about 121.9410267696.

Adding to 1813216 its reverse (6123181), we get a palindrome (7936397).

The spelling of 1813216 in words is "one million, eight hundred thirteen thousand, two hundred sixteen".