85222897 has 4 divisors (see below), whose sum is σ = 85765876. Its totient is φ = 84679920.

The previous prime is 85222867. The next prime is 85222931. The reversal of 85222897 is 79822258.

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 41873841 + 43349056 = 6471^2 + 6584^2 .

It is a cyclic number.

It is not a de Polignac number, because 85222897 - 2⁷ = 85222769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85222807) 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, 271254 + ... + 271567.

It is an arithmetic number, because the mean of its divisors is an integer number (21441469).

Almost surely, 2^85222897 is an apocalyptic number.

It is an amenable number.

85222897 is a deficient number, since it is larger than the sum of its proper divisors (542979).

85222897 is a wasteful number, since it uses less digits than its factorization.

85222897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542978.

The product of its digits is 161280, while the sum is 43.

The square root of 85222897 is about 9231.6248298986. The cubic root of 85222897 is about 440.0669612277.

The spelling of 85222897 in words is "eighty-five million, two hundred twenty-two thousand, eight hundred ninety-seven".