85543020 has 96 divisors (see below), whose sum is σ = 268094400. Its totient is φ = 22643712.

The previous prime is 85543019. The next prime is 85543021. The reversal of 85543020 is 2034558.

It is an interprime number because it is at equal distance from previous prime (85543019) and next prime (85543021).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (85543021) 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 31 ways as a sum of consecutive naturals, for example, 84276 + ... + 85284.

It is an arithmetic number, because the mean of its divisors is an integer number (2792650).

Almost surely, 2^85543020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85543020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134047200).

85543020 is an abundant number, since it is smaller than the sum of its proper divisors (182551380).

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

85543020 is a wasteful number, since it uses less digits than its factorization.

85543020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 85543020 is about 9248.9469670877. The cubic root of 85543020 is about 440.6172809875.

Adding to 85543020 its reverse (2034558), we get a palindrome (87577578).

The spelling of 85543020 in words is "eighty-five million, five hundred forty-three thousand, twenty".