86215716 has 18 divisors (see below), whose sum is σ = 217934262. Its totient is φ = 28738560.

The previous prime is 86215699. The next prime is 86215733. The reversal of 86215716 is 61751268.

86215716 is a `hidden beast` number, since 86 + 2 + 1 + 571 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (86215699) and next prime (86215733).

It can be written as a sum of positive squares in only one way, i.e., 71470116 + 14745600 = 8454^2 + 3840^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2394881 = 86215716 / (8 + 6 + 2 + 1 + 5 + 7 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1197405 + ... + 1197476.

It is an arithmetic number, because the mean of its divisors is an integer number (12107459).

Almost surely, 2^86215716 is an apocalyptic number.

It is an amenable number.

86215716 is an abundant number, since it is smaller than the sum of its proper divisors (131718546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86215716 is a wasteful number, since it uses less digits than its factorization.

86215716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394891 (or 2394886 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 86215716 is about 9285.2418385306. The cubic root of 86215716 is about 441.7692468191.

The spelling of 86215716 in words is "eighty-six million, two hundred fifteen thousand, seven hundred sixteen".