65500219 has 2 divisors, whose sum is σ = 65500220. Its totient is φ = 65500218.

The previous prime is 65500189. The next prime is 65500273. The reversal of 65500219 is 91200556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65500219 - 2¹⁷ = 65369147 is a prime.

It is a super-2 number, since 2×65500219² = 8580557378095922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65500319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750109 + 32750110.

It is an arithmetic number, because the mean of its divisors is an integer number (32750110).

Almost surely, 2^65500219 is an apocalyptic number.

65500219 is a deficient number, since it is larger than the sum of its proper divisors (1).

65500219 is an equidigital number, since it uses as much as digits as its factorization.

65500219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 65500219 is about 8093.2205579732. The cubic root of 65500219 is about 403.1013482027.

The spelling of 65500219 in words is "sixty-five million, five hundred thousand, two hundred nineteen".