219048209 has 2 divisors, whose sum is σ = 219048210. Its totient is φ = 219048208.

The previous prime is 219048161. The next prime is 219048233. The reversal of 219048209 is 902840912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213744400 + 5303809 = 14620^2 + 2303^2 .

It is a cyclic number.

It is not a de Polignac number, because 219048209 - 2²⁰ = 217999633 is a prime.

It is a super-2 number, since 2×219048209² = 95964235732215362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219048239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109524104 + 109524105.

It is an arithmetic number, because the mean of its divisors is an integer number (109524105).

Almost surely, 2^219048209 is an apocalyptic number.

It is an amenable number.

219048209 is a deficient number, since it is larger than the sum of its proper divisors (1).

219048209 is an equidigital number, since it uses as much as digits as its factorization.

219048209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 219048209 is about 14800.2773284827. The cubic root of 219048209 is about 602.8092421438.

The spelling of 219048209 in words is "two hundred nineteen million, forty-eight thousand, two hundred nine".