85219665 has 8 divisors (see below), whose sum is σ = 136351488. Its totient is φ = 45450480.

The previous prime is 85219663. The next prime is 85219697. The reversal of 85219665 is 56691258.

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

It is not a de Polignac number, because 85219665 - 2¹ = 85219663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85219663) 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, 2840641 + ... + 2840670.

It is an arithmetic number, because the mean of its divisors is an integer number (17043936).

Almost surely, 2^85219665 is an apocalyptic number.

It is an amenable number.

85219665 is a deficient number, since it is larger than the sum of its proper divisors (51131823).

85219665 is a wasteful number, since it uses less digits than its factorization.

85219665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681319.

The product of its digits is 129600, while the sum is 42.

The square root of 85219665 is about 9231.4497777976. The cubic root of 85219665 is about 440.0613981125.

The spelling of 85219665 in words is "eighty-five million, two hundred nineteen thousand, six hundred sixty-five".