85885631 has 12 divisors (see below), whose sum is σ = 93264120. Its totient is φ = 79054560.

The previous prime is 85885627. The next prime is 85885637. The reversal of 85885631 is 13658858.

It is not a de Polignac number, because 85885631 - 2² = 85885627 is a prime.

It is a super-2 number, since 2×85885631² = 14752683224536322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85885637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104201 + ... + 105021.

It is an arithmetic number, because the mean of its divisors is an integer number (7772010).

Almost surely, 2^85885631 is an apocalyptic number.

85885631 is a deficient number, since it is larger than the sum of its proper divisors (7378489).

85885631 is a wasteful number, since it uses less digits than its factorization.

85885631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466 (or 1453 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 85885631 is about 9267.4500807935. The cubic root of 85885631 is about 441.2047407080.

The spelling of 85885631 in words is "eighty-five million, eight hundred eighty-five thousand, six hundred thirty-one".