85151585 has 8 divisors (see below), whose sum is σ = 103194216. Its totient is φ = 67446400.

The previous prime is 85151581. The next prime is 85151593. The reversal of 85151585 is 58515158.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24373969 + 60777616 = 4937^2 + 7796^2 .

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

It is not a de Polignac number, because 85151585 - 2² = 85151581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85151581) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 83804 + ... + 84813.

It is an arithmetic number, because the mean of its divisors is an integer number (12899277).

Almost surely, 2^85151585 is an apocalyptic number.

It is an amenable number.

85151585 is a deficient number, since it is larger than the sum of its proper divisors (18042631).

85151585 is a wasteful number, since it uses less digits than its factorization.

85151585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168723.

The product of its digits is 40000, while the sum is 38.

The square root of 85151585 is about 9227.7616462499. The cubic root of 85151585 is about 439.9441819689.

The spelling of 85151585 in words is "eighty-five million, one hundred fifty-one thousand, five hundred eighty-five".