85229321 has 2 divisors, whose sum is σ = 85229322. Its totient is φ = 85229320.

The previous prime is 85229281. The next prime is 85229327. The reversal of 85229321 is 12392258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 29278921 = 7480^2 + 5411^2 .

It is a cyclic number.

It is not a de Polignac number, because 85229321 - 2⁶ = 85229257 is a prime.

It is not a weakly prime, because it can be changed into another prime (85229327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42614660 + 42614661.

It is an arithmetic number, because the mean of its divisors is an integer number (42614661).

Almost surely, 2^85229321 is an apocalyptic number.

It is an amenable number.

85229321 is a deficient number, since it is larger than the sum of its proper divisors (1).

85229321 is an equidigital number, since it uses as much as digits as its factorization.

85229321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 85229321 is about 9231.9727577588. The cubic root of 85229321 is about 440.0780181903.

The spelling of 85229321 in words is "eighty-five million, two hundred twenty-nine thousand, three hundred twenty-one".