85204219 has 2 divisors, whose sum is σ = 85204220. Its totient is φ = 85204218.

The previous prime is 85204183. The next prime is 85204243. The reversal of 85204219 is 91240258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85204219 - 2¹¹ = 85202171 is a prime.

It is a super-2 number, since 2×85204219² = 14519517870799922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85201219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42602109 + 42602110.

It is an arithmetic number, because the mean of its divisors is an integer number (42602110).

Almost surely, 2^85204219 is an apocalyptic number.

85204219 is a deficient number, since it is larger than the sum of its proper divisors (1).

85204219 is an equidigital number, since it uses as much as digits as its factorization.

85204219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 85204219 is about 9230.6131432316. The cubic root of 85204219 is about 440.0348095739.

It can be divided in two parts, 85 and 204219, that added together give a square (204304 = 452²).

The spelling of 85204219 in words is "eighty-five million, two hundred four thousand, two hundred nineteen".