86215181 has 12 divisors (see below), whose sum is σ = 93637440. Its totient is φ = 79344720.

The previous prime is 86215159. The next prime is 86215183. The reversal of 86215181 is 18151268.

It is not a de Polignac number, because 86215181 - 2²² = 82020877 is a prime.

It is a super-2 number, since 2×86215181² = 14866114869725522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86215183) 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 11 ways as a sum of consecutive naturals, for example, 82460 + ... + 83498.

It is an arithmetic number, because the mean of its divisors is an integer number (7803120).

Almost surely, 2^86215181 is an apocalyptic number.

It is an amenable number.

86215181 is a deficient number, since it is larger than the sum of its proper divisors (7422259).

86215181 is a wasteful number, since it uses less digits than its factorization.

86215181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1543 counting only the distinct ones).

The product of its digits is 3840, while the sum is 32.

The square root of 86215181 is about 9285.2130293279. The cubic root of 86215181 is about 441.7683330374.

The spelling of 86215181 in words is "eighty-six million, two hundred fifteen thousand, one hundred eighty-one".