219930317 has 2 divisors, whose sum is σ = 219930318. Its totient is φ = 219930316.

The previous prime is 219930311. The next prime is 219930323. The reversal of 219930317 is 713039912.

It is a balanced prime because it is at equal distance from previous prime (219930311) and next prime (219930323).

It can be written as a sum of positive squares in only one way, i.e., 195832036 + 24098281 = 13994^2 + 4909^2 .

It is a cyclic number.

It is not a de Polignac number, because 219930317 - 2¹⁰ = 219929293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219930311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109965158 + 109965159.

It is an arithmetic number, because the mean of its divisors is an integer number (109965159).

Almost surely, 2^219930317 is an apocalyptic number.

It is an amenable number.

219930317 is a deficient number, since it is larger than the sum of its proper divisors (1).

219930317 is an equidigital number, since it uses as much as digits as its factorization.

219930317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 219930317 is about 14830.0477747039. The cubic root of 219930317 is about 603.6173301185.

The spelling of 219930317 in words is "two hundred nineteen million, nine hundred thirty thousand, three hundred seventeen".