86197221 has 12 divisors (see below), whose sum is σ = 135826080. Its totient is φ = 52240680.

The previous prime is 86197219. The next prime is 86197247. The reversal of 86197221 is 12279168.

It is not a de Polignac number, because 86197221 - 2¹ = 86197219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86147221) 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 11 ways as a sum of consecutive naturals, for example, 435241 + ... + 435438.

It is an arithmetic number, because the mean of its divisors is an integer number (11318840).

Almost surely, 2^86197221 is an apocalyptic number.

It is an amenable number.

86197221 is a deficient number, since it is larger than the sum of its proper divisors (49628859).

86197221 is a wasteful number, since it uses less digits than its factorization.

86197221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870696 (or 870693 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 86197221 is about 9284.2458498254. The cubic root of 86197221 is about 441.7376551059.

The spelling of 86197221 in words is "eighty-six million, one hundred ninety-seven thousand, two hundred twenty-one".