85517020 has 12 divisors (see below), whose sum is σ = 179585784. Its totient is φ = 34206800.

The previous prime is 85517009. The next prime is 85517023. The reversal of 85517020 is 2071558.

It is a self number, because there is not a number n which added to its sum of digits gives 85517020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85517023) 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 3 ways as a sum of consecutive naturals, for example, 2137906 + ... + 2137945.

It is an arithmetic number, because the mean of its divisors is an integer number (14965482).

Almost surely, 2^85517020 is an apocalyptic number.

It is an amenable number.

85517020 is an abundant number, since it is smaller than the sum of its proper divisors (94068764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85517020 is a wasteful number, since it uses less digits than its factorization.

85517020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275860 (or 4275858 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 85517020 is about 9247.5412948524. The cubic root of 85517020 is about 440.5726359650.

Adding to 85517020 its reverse (2071558), we get a palindrome (87588578).

The spelling of 85517020 in words is "eighty-five million, five hundred seventeen thousand, twenty".