85155172 has 12 divisors (see below), whose sum is σ = 151547760. Its totient is φ = 41855816.

The previous prime is 85155149. The next prime is 85155197. The reversal of 85155172 is 27155158.

It is an unprimeable number.

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, 180178 + ... + 180649.

It is an arithmetic number, because the mean of its divisors is an integer number (12628980).

Almost surely, 2^85155172 is an apocalyptic number.

It is an amenable number.

85155172 is a deficient number, since it is larger than the sum of its proper divisors (66392588).

85155172 is a wasteful number, since it uses less digits than its factorization.

85155172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360890 (or 360888 counting only the distinct ones).

The product of its digits is 14000, while the sum is 34.

The square root of 85155172 is about 9227.9560033628. The cubic root of 85155172 is about 439.9503594136.

The spelling of 85155172 in words is "eighty-five million, one hundred fifty-five thousand, one hundred seventy-two".