219505443085 has 8 divisors (see below), whose sum is σ = 265737563640. Its totient is φ = 174050333184.

The previous prime is 219505443071. The next prime is 219505443097. The reversal of 219505443085 is 580344505912.

It can be written as a sum of positive squares in 4 ways, for example, as 26139452329 + 193365990756 = 161677^2 + 439734^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 219505443085 - 2²³ = 219497054477 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 194252040 + ... + 194253169.

It is an arithmetic number, because the mean of its divisors is an integer number (33217195455).

Almost surely, 2^219505443085 is an apocalyptic number.

It is an amenable number.

219505443085 is a deficient number, since it is larger than the sum of its proper divisors (46232120555).

219505443085 is a wasteful number, since it uses less digits than its factorization.

219505443085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388505327.

The product of its (nonzero) digits is 864000, while the sum is 46.

Adding to 219505443085 its reverse (580344505912), we get a palindrome (799849948997).

The spelling of 219505443085 in words is "two hundred nineteen billion, five hundred five million, four hundred forty-three thousand, eighty-five".