85217178 has 8 divisors (see below), whose sum is σ = 170434368. Its totient is φ = 28405724.

The previous prime is 85217177. The next prime is 85217189. The reversal of 85217178 is 87171258.

It is a sphenic number, since it is the product of 3 distinct primes.

85217178 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (85217177) 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, 7101426 + ... + 7101437.

It is an arithmetic number, because the mean of its divisors is an integer number (21304296).

Almost surely, 2^85217178 is an apocalyptic number.

85217178 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85217178 is a wasteful number, since it uses less digits than its factorization.

85217178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14202868.

The product of its digits is 31360, while the sum is 39.

The square root of 85217178 is about 9231.3150742459. The cubic root of 85217178 is about 440.0571172408.

The spelling of 85217178 in words is "eighty-five million, two hundred seventeen thousand, one hundred seventy-eight".