85471219 has 2 divisors, whose sum is σ = 85471220. Its totient is φ = 85471218.

The previous prime is 85471213. The next prime is 85471237. The reversal of 85471219 is 91217458.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85471219 is a prime.

It is a super-2 number, since 2×85471219² = 14610658554691922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85471213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42735609 + 42735610.

It is an arithmetic number, because the mean of its divisors is an integer number (42735610).

Almost surely, 2^85471219 is an apocalyptic number.

85471219 is a deficient number, since it is larger than the sum of its proper divisors (1).

85471219 is an equidigital number, since it uses as much as digits as its factorization.

85471219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 85471219 is about 9245.0645752207. The cubic root of 85471219 is about 440.4939683080.

The spelling of 85471219 in words is "eighty-five million, four hundred seventy-one thousand, two hundred nineteen".