85165213 has 4 divisors (see below), whose sum is σ = 97331680. Its totient is φ = 72998748.

The previous prime is 85165207. The next prime is 85165217. The reversal of 85165213 is 31256158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85165213 - 2⁹ = 85164701 is a prime.

It is a super-2 number, since 2×85165213² = 14506227010670738, which contains 22 as substring.

It is the 9229-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85165217) by changing a digit.

It is a nontrivial repunit in base 9228.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6083223 + ... + 6083236.

It is an arithmetic number, because the mean of its divisors is an integer number (24332920).

Almost surely, 2^85165213 is an apocalyptic number.

It is an amenable number.

85165213 is a deficient number, since it is larger than the sum of its proper divisors (12166467).

85165213 is a wasteful number, since it uses less digits than its factorization.

85165213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12166466.

The product of its digits is 7200, while the sum is 31.

The square root of 85165213 is about 9228.5000406350. The cubic root of 85165213 is about 439.9676508586.

The spelling of 85165213 in words is "eighty-five million, one hundred sixty-five thousand, two hundred thirteen".