86231871 has 40 divisors (see below), whose sum is σ = 148818384. Its totient is φ = 49178880.

The previous prime is 86231869. The next prime is 86231911. The reversal of 86231871 is 17813268.

It is not a de Polignac number, because 86231871 - 2¹ = 86231869 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86231851) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12301 + ... + 17993.

Almost surely, 2^86231871 is an apocalyptic number.

86231871 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

86231871 is a deficient number, since it is larger than the sum of its proper divisors (62586513).

86231871 is a wasteful number, since it uses less digits than its factorization.

86231871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733 (or 5724 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 86231871 is about 9286.1117266593. Note that the first 3 decimals coincide. The cubic root of 86231871 is about 441.7968378308.

The spelling of 86231871 in words is "eighty-six million, two hundred thirty-one thousand, eight hundred seventy-one".