86158221 has 4 divisors (see below), whose sum is σ = 114877632. Its totient is φ = 57438812.

The previous prime is 86158211. The next prime is 86158229. The reversal of 86158221 is 12285168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86158221 - 2⁶ = 86158157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86158229) 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, 14359701 + ... + 14359706.

It is an arithmetic number, because the mean of its divisors is an integer number (28719408).

Almost surely, 2^86158221 is an apocalyptic number.

It is an amenable number.

86158221 is a deficient number, since it is larger than the sum of its proper divisors (28719411).

86158221 is a wasteful number, since it uses less digits than its factorization.

86158221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28719410.

The product of its digits is 7680, while the sum is 33.

The square root of 86158221 is about 9282.1452800525. The cubic root of 86158221 is about 441.6710235399.

It can be divided in two parts, 8615 and 8221, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 86158221 in words is "eighty-six million, one hundred fifty-eight thousand, two hundred twenty-one".