8515486321 has 4 divisors (see below), whose sum is σ = 8519116912. Its totient is φ = 8511855732.

The previous prime is 8515486297. The next prime is 8515486339. The reversal of 8515486321 is 1236845158.

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 not a de Polignac number, because 8515486321 - 2¹¹ = 8515484273 is a prime.

It is a super-3 number, since 3×8515486321³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8515486391) 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, 1811775 + ... + 1816468.

It is an arithmetic number, because the mean of its divisors is an integer number (2129779228).

Almost surely, 2^8515486321 is an apocalyptic number.

It is an amenable number.

8515486321 is a deficient number, since it is larger than the sum of its proper divisors (3630591).

8515486321 is a wasteful number, since it uses less digits than its factorization.

8515486321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630590.

The product of its digits is 230400, while the sum is 43.

The square root of 8515486321 is about 92279.3927212354. The cubic root of 8515486321 is about 2042.0662072759.

The spelling of 8515486321 in words is "eight billion, five hundred fifteen million, four hundred eighty-six thousand, three hundred twenty-one".