85857229 has 12 divisors (see below), whose sum is σ = 90636700. Its totient is φ = 81316224.

The previous prime is 85857221. The next prime is 85857253. The reversal of 85857229 is 92275858.

It can be written as a sum of positive squares in 2 ways, for example, as 38564100 + 47293129 = 6210^2 + 6877^2 .

It is not a de Polignac number, because 85857229 - 2³ = 85857221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85857221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56917 + ... + 58405.

Almost surely, 2^85857229 is an apocalyptic number.

It is an amenable number.

85857229 is a deficient number, since it is larger than the sum of its proper divisors (4779471).

85857229 is a wasteful number, since it uses less digits than its factorization.

85857229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 1621 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The square root of 85857229 is about 9265.9176016194. The cubic root of 85857229 is about 441.1561005242.

The spelling of 85857229 in words is "eighty-five million, eight hundred fifty-seven thousand, two hundred twenty-nine".