86216231 has 4 divisors (see below), whose sum is σ = 91287792. Its totient is φ = 81144672.

The previous prime is 86216201. The next prime is 86216237. The reversal of 86216231 is 13261268.

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

It is not a de Polignac number, because 86216231 - 2¹⁸ = 85954087 is a prime.

It is a super-2 number, since 2×86216231² = 14866476975690722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86216194 and 86216203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86216237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2535755 + ... + 2535788.

It is an arithmetic number, because the mean of its divisors is an integer number (22821948).

Almost surely, 2^86216231 is an apocalyptic number.

86216231 is a deficient number, since it is larger than the sum of its proper divisors (5071561).

86216231 is a wasteful number, since it uses less digits than its factorization.

86216231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071560.

The product of its digits is 3456, while the sum is 29.

The square root of 86216231 is about 9285.2695706694. The cubic root of 86216231 is about 441.7701264372.

Adding to 86216231 its reverse (13261268), we get a palindrome (99477499).

The spelling of 86216231 in words is "eighty-six million, two hundred sixteen thousand, two hundred thirty-one".