85531217 has 8 divisors (see below), whose sum is σ = 90185760. Its totient is φ = 80892000.

The previous prime is 85531189. The next prime is 85531219. The reversal of 85531217 is 71213558.

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

It is a cyclic number.

It is not a de Polignac number, because 85531217 - 2¹² = 85527121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85531219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8717 + ... + 15717.

It is an arithmetic number, because the mean of its divisors is an integer number (11273220).

Almost surely, 2^85531217 is an apocalyptic number.

It is an amenable number.

85531217 is a deficient number, since it is larger than the sum of its proper divisors (4654543).

85531217 is a wasteful number, since it uses less digits than its factorization.

85531217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663.

The product of its digits is 8400, while the sum is 32.

The square root of 85531217 is about 9248.3088724372. The cubic root of 85531217 is about 440.5970149857.

The spelling of 85531217 in words is "eighty-five million, five hundred thirty-one thousand, two hundred seventeen".