85131663 has 16 divisors (see below), whose sum is σ = 115504896. Its totient is φ = 55765440.

The previous prime is 85131659. The next prime is 85131691. The reversal of 85131663 is 36613158.

It is not a de Polignac number, because 85131663 - 2² = 85131659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85131623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41328 + ... + 43338.

It is an arithmetic number, because the mean of its divisors is an integer number (7219056).

Almost surely, 2^85131663 is an apocalyptic number.

85131663 is a deficient number, since it is larger than the sum of its proper divisors (30373233).

85131663 is a wasteful number, since it uses less digits than its factorization.

85131663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254.

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

The square root of 85131663 is about 9226.6821230603. The cubic root of 85131663 is about 439.9098696242.

The spelling of 85131663 in words is "eighty-five million, one hundred thirty-one thousand, six hundred sixty-three".