85008531 has 4 divisors (see below), whose sum is σ = 113344712. Its totient is φ = 56672352.

The previous prime is 85008491. The next prime is 85008533. The reversal of 85008531 is 13580058.

It is a happy number.

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

It is not a de Polignac number, because 85008531 - 2⁶ = 85008467 is a prime.

It is a super-2 number, since 2×85008531² = 14452900685555922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85008533) 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, 14168086 + ... + 14168091.

It is an arithmetic number, because the mean of its divisors is an integer number (28336178).

Almost surely, 2^85008531 is an apocalyptic number.

85008531 is a deficient number, since it is larger than the sum of its proper divisors (28336181).

85008531 is a wasteful number, since it uses less digits than its factorization.

85008531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28336180.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 85008531 is about 9220.0071041187. The cubic root of 85008531 is about 439.6976762743.

Adding to 85008531 its reverse (13580058), we get a palindrome (98588589).

The spelling of 85008531 in words is "eighty-five million, eight thousand, five hundred thirty-one".