86515865 has 4 divisors (see below), whose sum is σ = 103819044. Its totient is φ = 69212688.

The previous prime is 86515859. The next prime is 86515927. The reversal of 86515865 is 56851568.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13601344 + 72914521 = 3688^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 86515865 - 2⁶ = 86515801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8651582 + ... + 8651591.

It is an arithmetic number, because the mean of its divisors is an integer number (25954761).

Almost surely, 2^86515865 is an apocalyptic number.

It is an amenable number.

86515865 is a deficient number, since it is larger than the sum of its proper divisors (17303179).

86515865 is a wasteful number, since it uses less digits than its factorization.

86515865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17303178.

The product of its digits is 288000, while the sum is 44.

The square root of 86515865 is about 9301.3904874486. The cubic root of 86515865 is about 442.2813074504.

The spelling of 86515865 in words is "eighty-six million, five hundred fifteen thousand, eight hundred sixty-five".