85554821 has 16 divisors (see below), whose sum is σ = 96104448. Its totient is φ = 75490800.

The previous prime is 85554811. The next prime is 85554827. The reversal of 85554821 is 12845558.

It is not a de Polignac number, because 85554821 - 2¹⁸ = 85292677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85554827) 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 15 ways as a sum of consecutive naturals, for example, 89870 + ... + 90816.

It is an arithmetic number, because the mean of its divisors is an integer number (6006528).

Almost surely, 2^85554821 is an apocalyptic number.

It is an amenable number.

85554821 is a deficient number, since it is larger than the sum of its proper divisors (10549627).

85554821 is a wasteful number, since it uses less digits than its factorization.

85554821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its digits is 64000, while the sum is 38.

The square root of 85554821 is about 9249.5849096054. The cubic root of 85554821 is about 440.6375416915.

The spelling of 85554821 in words is "eighty-five million, five hundred fifty-four thousand, eight hundred twenty-one".