86206521 has 8 divisors (see below), whose sum is σ = 115317664. Its totient is φ = 57283200.

The previous prime is 86206517. The next prime is 86206577. The reversal of 86206521 is 12560268.

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

It is not a de Polignac number, because 86206521 - 2² = 86206517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86206511) 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, 45880 + ... + 47721.

It is an arithmetic number, because the mean of its divisors is an integer number (14414708).

Almost surely, 2^86206521 is an apocalyptic number.

It is an amenable number.

86206521 is a deficient number, since it is larger than the sum of its proper divisors (29111143).

86206521 is a wasteful number, since it uses less digits than its factorization.

86206521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93911.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 86206521 is about 9284.7466847513. The cubic root of 86206521 is about 441.7535412037.

Adding to 86206521 its reverse (12560268), we get a palindrome (98766789).

The spelling of 86206521 in words is "eighty-six million, two hundred six thousand, five hundred twenty-one".