86400221 has 4 divisors (see below), whose sum is σ = 87371100. Its totient is φ = 85429344.

The previous prime is 86400203. The next prime is 86400227. The reversal of 86400221 is 12200468.

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 50268100 + 36132121 = 7090^2 + 6011^2 .

It is a cyclic number.

It is not a de Polignac number, because 86400221 - 2⁶ = 86400157 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 (86400227) 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, 485306 + ... + 485483.

It is an arithmetic number, because the mean of its divisors is an integer number (21842775).

Almost surely, 2^86400221 is an apocalyptic number.

It is an amenable number.

86400221 is a deficient number, since it is larger than the sum of its proper divisors (970879).

86400221 is an equidigital number, since it uses as much as digits as its factorization.

86400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970878.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 86400221 is about 9295.1719187974. The cubic root of 86400221 is about 442.0841567675.

Adding to 86400221 its reverse (12200468), we get a palindrome (98600689).

The spelling of 86400221 in words is "eighty-six million, four hundred thousand, two hundred twenty-one".