86982236221 has 4 divisors (see below), whose sum is σ = 87462801244. Its totient is φ = 86501671200.

The previous prime is 86982236207. The next prime is 86982236251. The reversal of 86982236221 is 12263228968.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4776744996 + 82205491225 = 69114^2 + 286715^2 .

It is a cyclic number.

It is not a de Polignac number, because 86982236221 - 2⁹ = 86982235709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86982236251) 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, 240282240 + ... + 240282601.

It is an arithmetic number, because the mean of its divisors is an integer number (21865700311).

Almost surely, 2^86982236221 is an apocalyptic number.

It is an amenable number.

86982236221 is a deficient number, since it is larger than the sum of its proper divisors (480565023).

86982236221 is a wasteful number, since it uses less digits than its factorization.

86982236221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480565022.

The product of its digits is 995328, while the sum is 49.

The spelling of 86982236221 in words is "eighty-six billion, nine hundred eighty-two million, two hundred thirty-six thousand, two hundred twenty-one".