85647221 has 8 divisors (see below), whose sum is σ = 93878688. Its totient is φ = 77490000.

The previous prime is 85647197. The next prime is 85647227. The reversal of 85647221 is 12274658.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85647221 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 (85647227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16130 + ... + 20771.

It is an arithmetic number, because the mean of its divisors is an integer number (11734836).

Almost surely, 2^85647221 is an apocalyptic number.

It is an amenable number.

85647221 is a deficient number, since it is larger than the sum of its proper divisors (8231467).

85647221 is a wasteful number, since it uses less digits than its factorization.

85647221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37123.

The product of its digits is 26880, while the sum is 35.

The square root of 85647221 is about 9254.5783804558. The cubic root of 85647221 is about 440.7961154951.

The spelling of 85647221 in words is "eighty-five million, six hundred forty-seven thousand, two hundred twenty-one".