86211871 has 4 divisors (see below), whose sum is σ = 86245432. Its totient is φ = 86178312.

The previous prime is 86211869. The next prime is 86211877. The reversal of 86211871 is 17811268.

86211871 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86211871 - 2¹ = 86211869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86211877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12576 + ... + 18181.

It is an arithmetic number, because the mean of its divisors is an integer number (21561358).

Almost surely, 2^86211871 is an apocalyptic number.

86211871 is a deficient number, since it is larger than the sum of its proper divisors (33561).

86211871 is a wasteful number, since it uses less digits than its factorization.

86211871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33560.

The product of its digits is 5376, while the sum is 34.

The square root of 86211871 is about 9285.0347872262. The cubic root of 86211871 is about 441.7626794627.

The spelling of 86211871 in words is "eighty-six million, two hundred eleven thousand, eight hundred seventy-one".