86215613 has 4 divisors (see below), whose sum is σ = 94053408. Its totient is φ = 78377820.

The previous prime is 86215603. The next prime is 86215627. The reversal of 86215613 is 31651268.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86215613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86215613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86215603) 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, 3918881 + ... + 3918902.

It is an arithmetic number, because the mean of its divisors is an integer number (23513352).

Almost surely, 2^86215613 is an apocalyptic number.

It is an amenable number.

86215613 is a deficient number, since it is larger than the sum of its proper divisors (7837795).

86215613 is a wasteful number, since it uses less digits than its factorization.

86215613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7837794.

The product of its digits is 8640, while the sum is 32.

The square root of 86215613 is about 9285.2362920929. The cubic root of 86215613 is about 441.7690708951.

The spelling of 86215613 in words is "eighty-six million, two hundred fifteen thousand, six hundred thirteen".