85801131 has 36 divisors (see below), whose sum is σ = 141312600. Its totient is φ = 50004864.

The previous prime is 85801129. The next prime is 85801139. The reversal of 85801131 is 13110858.

It is not a de Polignac number, because 85801131 - 2¹ = 85801129 is a prime.

It is a super-2 number, since 2×85801131² = 14723668161758322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85801095 and 85801104.

It is not an unprimeable number, because it can be changed into a prime (85801139) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27415 + ... + 30383.

It is an arithmetic number, because the mean of its divisors is an integer number (3925350).

Almost surely, 2^85801131 is an apocalyptic number.

85801131 is a deficient number, since it is larger than the sum of its proper divisors (55511469).

85801131 is a wasteful number, since it uses less digits than its factorization.

85801131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 85801131 is about 9262.8899917898. The cubic root of 85801131 is about 441.0599976987.

Adding to 85801131 its reverse (13110858), we get a palindrome (98911989).

The spelling of 85801131 in words is "eighty-five million, eight hundred one thousand, one hundred thirty-one".