85216277 has 2 divisors, whose sum is σ = 85216278. Its totient is φ = 85216276.

The previous prime is 85216267. The next prime is 85216279. The reversal of 85216277 is 77261258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81252196 + 3964081 = 9014^2 + 1991^2 .

It is a cyclic number.

It is not a de Polignac number, because 85216277 - 2⁶ = 85216213 is a prime.

Together with 85216279, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85216277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85216279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42608138 + 42608139.

It is an arithmetic number, because the mean of its divisors is an integer number (42608139).

Almost surely, 2^85216277 is an apocalyptic number.

It is an amenable number.

85216277 is a deficient number, since it is larger than the sum of its proper divisors (1).

85216277 is an equidigital number, since it uses as much as digits as its factorization.

85216277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 85216277 is about 9231.2662728360. The cubic root of 85216277 is about 440.0555663295.

The spelling of 85216277 in words is "eighty-five million, two hundred sixteen thousand, two hundred seventy-seven".