85443321 has 16 divisors (see below), whose sum is σ = 121411584. Its totient is φ = 53324304.

The previous prime is 85443313. The next prime is 85443331. The reversal of 85443321 is 12334458.

It is not a de Polignac number, because 85443321 - 2³ = 85443313 is a prime.

It is a super-2 number, since 2×85443321² = 14601122207018082, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (85443311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9931 + ... + 16416.

It is an arithmetic number, because the mean of its divisors is an integer number (7588224).

Almost surely, 2^85443321 is an apocalyptic number.

It is an amenable number.

85443321 is a deficient number, since it is larger than the sum of its proper divisors (35968263).

85443321 is a wasteful number, since it uses less digits than its factorization.

85443321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26420.

The product of its digits is 11520, while the sum is 30.

The square root of 85443321 is about 9243.5556470441. Note that the first 3 decimals coincide. The cubic root of 85443321 is about 440.4460370154.

Adding to 85443321 its reverse (12334458), we get a palindrome (97777779).

The spelling of 85443321 in words is "eighty-five million, four hundred forty-three thousand, three hundred twenty-one".