86310221 has 4 divisors (see below), whose sum is σ = 86337372. Its totient is φ = 86283072.

The previous prime is 86310197. The next prime is 86310223. The reversal of 86310221 is 12201368.

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 79477225 + 6832996 = 8915^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 86310221 - 2⁶ = 86310157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86310223) 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, 8060 + ... + 15413.

It is an arithmetic number, because the mean of its divisors is an integer number (21584343).

Almost surely, 2^86310221 is an apocalyptic number.

It is an amenable number.

86310221 is a deficient number, since it is larger than the sum of its proper divisors (27151).

86310221 is a wasteful number, since it uses less digits than its factorization.

86310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27150.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 86310221 is about 9290.3294344173. The cubic root of 86310221 is about 441.9306023871.

Adding to 86310221 its reverse (12201368), we get a palindrome (98511589).

The spelling of 86310221 in words is "eighty-six million, three hundred ten thousand, two hundred twenty-one".