86217715 has 4 divisors (see below), whose sum is σ = 103461264. Its totient is φ = 68974168.

The previous prime is 86217713. The next prime is 86217739. The reversal of 86217715 is 51771268.

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 86217715 - 2¹ = 86217713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86217713) 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, 8621767 + ... + 8621776.

It is an arithmetic number, because the mean of its divisors is an integer number (25865316).

Almost surely, 2^86217715 is an apocalyptic number.

86217715 is a deficient number, since it is larger than the sum of its proper divisors (17243549).

86217715 is a wasteful number, since it uses less digits than its factorization.

86217715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17243548.

The product of its digits is 23520, while the sum is 37.

The square root of 86217715 is about 9285.3494818450. The cubic root of 86217715 is about 441.7726610841.

The spelling of 86217715 in words is "eighty-six million, two hundred seventeen thousand, seven hundred fifteen".