86512321 has 8 divisors (see below), whose sum is σ = 99341504. Its totient is φ = 73800720.

The previous prime is 86512297. The next prime is 86512331. The reversal of 86512321 is 12321568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86512321 - 2¹⁹ = 85988033 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 86512321.

It is not an unprimeable number, because it can be changed into a prime (86512331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27810 + ... + 30763.

It is an arithmetic number, because the mean of its divisors is an integer number (12417688).

Almost surely, 2^86512321 is an apocalyptic number.

It is an amenable number.

86512321 is a deficient number, since it is larger than the sum of its proper divisors (12829183).

86512321 is a wasteful number, since it uses less digits than its factorization.

86512321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58791.

The product of its digits is 2880, while the sum is 28.

The square root of 86512321 is about 9301.1999763471. The cubic root of 86512321 is about 442.2752682253.

Adding to 86512321 its reverse (12321568), we get a palindrome (98833889).

The spelling of 86512321 in words is "eighty-six million, five hundred twelve thousand, three hundred twenty-one".