85228169 has 4 divisors (see below), whose sum is σ = 91784196. Its totient is φ = 78672144.

The previous prime is 85228159. The next prime is 85228183. The reversal of 85228169 is 96182258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96182258 = 2 ⋅48091129.

It can be written as a sum of positive squares in 2 ways, for example, as 49168144 + 36060025 = 7012^2 + 6005^2 .

It is a cyclic number.

It is not a de Polignac number, because 85228169 - 2⁴ = 85228153 is a prime.

It is a super-2 number, since 2×85228169² = 14527681582185122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85228159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277994 + ... + 3278019.

It is an arithmetic number, because the mean of its divisors is an integer number (22946049).

Almost surely, 2^85228169 is an apocalyptic number.

It is an amenable number.

85228169 is a deficient number, since it is larger than the sum of its proper divisors (6556027).

85228169 is a wasteful number, since it uses less digits than its factorization.

85228169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556026.

The product of its digits is 69120, while the sum is 41.

The square root of 85228169 is about 9231.9103656827. The cubic root of 85228169 is about 440.0760354135.

The spelling of 85228169 in words is "eighty-five million, two hundred twenty-eight thousand, one hundred sixty-nine".