85636131 has 16 divisors (see below), whose sum is σ = 132634368. Its totient is φ = 48132000.

The previous prime is 85636129. The next prime is 85636139. The reversal of 85636131 is 13163658.

It is not a de Polignac number, because 85636131 - 2¹ = 85636129 is a prime.

It is a super-2 number, since 2×85636131² = 14667093865298322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85636092 and 85636101.

It is not an unprimeable number, because it can be changed into a prime (85636139) 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, 32145 + ... + 34706.

It is an arithmetic number, because the mean of its divisors is an integer number (8289648).

Almost surely, 2^85636131 is an apocalyptic number.

85636131 is a deficient number, since it is larger than the sum of its proper divisors (46998237).

85636131 is a wasteful number, since it uses less digits than its factorization.

85636131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66922.

The product of its digits is 12960, while the sum is 33.

The square root of 85636131 is about 9253.9791981612. The cubic root of 85636131 is about 440.7770892311. Note that the first 3 decimals are identical.

Adding to 85636131 its reverse (13163658), we get a palindrome (98799789).

The spelling of 85636131 in words is "eighty-five million, six hundred thirty-six thousand, one hundred thirty-one".