2173219 has 2 divisors, whose sum is σ = 2173220. Its totient is φ = 2173218.

The previous prime is 2173207. The next prime is 2173243. The reversal of 2173219 is 9123712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2173219 - 2¹³ = 2165027 is a prime.

It is a super-2 number, since 2×2173219² = 9445761643922, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 7⁵ + 3¹⁰ + 2²¹ + 1 + 9² .

2173219 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2173193 and 2173202.

It is not a weakly prime, because it can be changed into another prime (2173319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086609 + 1086610.

It is an arithmetic number, because the mean of its divisors is an integer number (1086610).

2^2173219 is an apocalyptic number.

2173219 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173219 is an equidigital number, since it uses as much as digits as its factorization.

2173219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 2173219 is about 1474.1841811660. The cubic root of 2173219 is about 129.5292441024.

The spelling of 2173219 in words is "two million, one hundred seventy-three thousand, two hundred nineteen".