308219 has 2 divisors, whose sum is σ = 308220. Its totient is φ = 308218.

The previous prime is 308213. The next prime is 308249. The reversal of 308219 is 912803.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308219 is a prime.

It is a super-2 number, since 2×308219² = 189997903922, 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 = 308194 and 308203.

It is not a weakly prime, because it can be changed into another prime (308213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154109 + 154110.

It is an arithmetic number, because the mean of its divisors is an integer number (154110).

2³⁰⁸²¹⁹ is an apocalyptic number.

308219 is a deficient number, since it is larger than the sum of its proper divisors (1).

308219 is an equidigital number, since it uses as much as digits as its factorization.

308219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 308219 is about 555.1747472643. The cubic root of 308219 is about 67.5491366046.

The spelling of 308219 in words is "three hundred eight thousand, two hundred nineteen".