85131136 has 32 divisors (see below), whose sum is σ = 170925480. Its totient is φ = 42232320.

The previous prime is 85131133. The next prime is 85131139. The reversal of 85131136 is 63113158.

It is an interprime number because it is at equal distance from previous prime (85131133) and next prime (85131139).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85131133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14230 + ... + 19306.

Almost surely, 2^85131136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85131136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85462740).

85131136 is an abundant number, since it is smaller than the sum of its proper divisors (85794344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85131136 is a wasteful number, since it uses less digits than its factorization.

85131136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5222 (or 5210 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 85131136 is about 9226.6535645379. The cubic root of 85131136 is about 439.9089618813.

The spelling of 85131136 in words is "eighty-five million, one hundred thirty-one thousand, one hundred thirty-six".