86211331 has 4 divisors (see below), whose sum is σ = 87672600. Its totient is φ = 84750064.

The previous prime is 86211317. The next prime is 86211343. The reversal of 86211331 is 13311268.

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

It is a cyclic number.

It is not a de Polignac number, because 86211331 - 2⁵ = 86211299 is a prime.

It is a super-2 number, since 2×86211331² = 14864787185583122, 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 = 86211296 and 86211305.

It is not an unprimeable number, because it can be changed into a prime (86211311) 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, 730546 + ... + 730663.

It is an arithmetic number, because the mean of its divisors is an integer number (21918150).

Almost surely, 2^86211331 is an apocalyptic number.

86211331 is a deficient number, since it is larger than the sum of its proper divisors (1461269).

86211331 is a wasteful number, since it uses less digits than its factorization.

86211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461268.

The product of its digits is 864, while the sum is 25.

The square root of 86211331 is about 9285.0057081296. The cubic root of 86211331 is about 441.7617571136.

Adding to 86211331 its reverse (13311268), we get a palindrome (99522599).

The spelling of 86211331 in words is "eighty-six million, two hundred eleven thousand, three hundred thirty-one".