85221317 has 8 divisors (see below), whose sum is σ = 86056320. Its totient is φ = 84389760.

The previous prime is 85221307. The next prime is 85221319. The reversal of 85221317 is 71312258.

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 85221317 - 2¹⁰ = 85220293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85221317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85221319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93092 + ... + 94002.

It is an arithmetic number, because the mean of its divisors is an integer number (10757040).

Almost surely, 2^85221317 is an apocalyptic number.

It is an amenable number.

85221317 is a deficient number, since it is larger than the sum of its proper divisors (835003).

85221317 is a wasteful number, since it uses less digits than its factorization.

85221317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723.

The product of its digits is 3360, while the sum is 29.

The square root of 85221317 is about 9231.5392541006. The cubic root of 85221317 is about 440.0642416531.

The spelling of 85221317 in words is "eighty-five million, two hundred twenty-one thousand, three hundred seventeen".