219530471 has 2 divisors, whose sum is σ = 219530472. Its totient is φ = 219530470.

The previous prime is 219530459. The next prime is 219530473. The reversal of 219530471 is 174035912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 219530471 - 2²² = 215336167 is a prime.

It is a super-3 number, since 3×219530471³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 219530473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219530473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109765235 + 109765236.

It is an arithmetic number, because the mean of its divisors is an integer number (109765236).

Almost surely, 2^219530471 is an apocalyptic number.

219530471 is a deficient number, since it is larger than the sum of its proper divisors (1).

219530471 is an equidigital number, since it uses as much as digits as its factorization.

219530471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 219530471 is about 14816.5607007834. The cubic root of 219530471 is about 603.2513045044.

The spelling of 219530471 in words is "two hundred nineteen million, five hundred thirty thousand, four hundred seventy-one".