85445231 has 4 divisors (see below), whose sum is σ = 85683600. Its totient is φ = 85206864.

The previous prime is 85445221. The next prime is 85445237. The reversal of 85445231 is 13254458.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85445231 - 2¹⁰ = 85444207 is a prime.

It is a super-2 number, since 2×85445231² = 14601775001286722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85445237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118646 + ... + 119363.

It is an arithmetic number, because the mean of its divisors is an integer number (21420900).

Almost surely, 2^85445231 is an apocalyptic number.

85445231 is a deficient number, since it is larger than the sum of its proper divisors (238369).

85445231 is a wasteful number, since it uses less digits than its factorization.

85445231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238368.

The product of its digits is 19200, while the sum is 32.

The square root of 85445231 is about 9243.6589616883. The cubic root of 85445231 is about 440.4493189012.

Adding to 85445231 its reverse (13254458), we get a palindrome (98699689).

The spelling of 85445231 in words is "eighty-five million, four hundred forty-five thousand, two hundred thirty-one".