85244219 has 2 divisors, whose sum is σ = 85244220. Its totient is φ = 85244218.

The previous prime is 85244209. The next prime is 85244221. The reversal of 85244219 is 91244258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85244219 - 2¹² = 85240123 is a prime.

It is a super-2 number, since 2×85244219² = 14533153745839922, which contains 22 as substring.

Together with 85244221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85244209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42622109 + 42622110.

It is an arithmetic number, because the mean of its divisors is an integer number (42622110).

Almost surely, 2^85244219 is an apocalyptic number.

85244219 is a deficient number, since it is larger than the sum of its proper divisors (1).

85244219 is an equidigital number, since it uses as much as digits as its factorization.

85244219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 85244219 is about 9232.7795923005. The cubic root of 85244219 is about 440.1036584287.

The spelling of 85244219 in words is "eighty-five million, two hundred forty-four thousand, two hundred nineteen".