85322561 has 4 divisors (see below), whose sum is σ = 85347012. Its totient is φ = 85298112.

The previous prime is 85322551. The next prime is 85322563. The reversal of 85322561 is 16522358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61858225 + 23464336 = 7865^2 + 4844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85322561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85322563) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5900 + ... + 14333.

It is an arithmetic number, because the mean of its divisors is an integer number (21336753).

Almost surely, 2^85322561 is an apocalyptic number.

It is an amenable number.

85322561 is a deficient number, since it is larger than the sum of its proper divisors (24451).

85322561 is a wasteful number, since it uses less digits than its factorization.

85322561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450.

The product of its digits is 14400, while the sum is 32.

The square root of 85322561 is about 9237.0212189861. The cubic root of 85322561 is about 440.2384399788.

The spelling of 85322561 in words is "eighty-five million, three hundred twenty-two thousand, five hundred sixty-one".