1810219 has 2 divisors, whose sum is σ = 1810220. Its totient is φ = 1810218.

The previous prime is 1810217. The next prime is 1810241. The reversal of 1810219 is 9120181.

It is an a-pointer prime, because the next prime (1810241) can be obtained adding 1810219 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1810219 - 2¹ = 1810217 is a prime.

It is a super-2 number, since 2×1810219² = 6553785655922, which contains 22 as substring.

Together with 1810217, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1810219.

It is not a weakly prime, because it can be changed into another prime (1810213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905109 + 905110.

It is an arithmetic number, because the mean of its divisors is an integer number (905110).

2^1810219 is an apocalyptic number.

1810219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1810219 is an equidigital number, since it uses as much as digits as its factorization.

1810219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1810219 is about 1345.4437929546. The cubic root of 1810219 is about 121.8738057301.

The spelling of 1810219 in words is "one million, eight hundred ten thousand, two hundred nineteen".