86715231 has 8 divisors (see below), whose sum is σ = 115885440. Its totient is φ = 57677592.

The previous prime is 86715217. The next prime is 86715241. The reversal of 86715231 is 13251768.

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

It is not a de Polignac number, because 86715231 - 2⁵ = 86715199 is a prime.

It is a super-2 number, since 2×86715231² = 15039062574766722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86715192 and 86715201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86715241) 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, 31605 + ... + 34238.

It is an arithmetic number, because the mean of its divisors is an integer number (14485680).

Almost surely, 2^86715231 is an apocalyptic number.

86715231 is a deficient number, since it is larger than the sum of its proper divisors (29170209).

86715231 is a wasteful number, since it uses less digits than its factorization.

86715231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66285.

The product of its digits is 10080, while the sum is 33.

The square root of 86715231 is about 9312.1013203251. The cubic root of 86715231 is about 442.6207758677.

Adding to 86715231 its reverse (13251768), we get a palindrome (99966999).

The spelling of 86715231 in words is "eighty-six million, seven hundred fifteen thousand, two hundred thirty-one".