2171219 has 2 divisors, whose sum is σ = 2171220. Its totient is φ = 2171218.

The previous prime is 2171203. The next prime is 2171231. The reversal of 2171219 is 9121712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2171219 - 2⁴ = 2171203 is a prime.

It is a super-2 number, since 2×2171219² = 9428383891922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2171194 and 2171203.

It is not a weakly prime, because it can be changed into another prime (2171249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085609 + 1085610.

It is an arithmetic number, because the mean of its divisors is an integer number (1085610).

2^2171219 is an apocalyptic number.

2171219 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171219 is an equidigital number, since it uses as much as digits as its factorization.

2171219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 23.

The square root of 2171219 is about 1473.5056837352. The cubic root of 2171219 is about 129.4894969195.

The spelling of 2171219 in words is "two million, one hundred seventy-one thousand, two hundred nineteen".