18227158 has 8 divisors (see below), whose sum is σ = 27365400. Its totient is φ = 9105360.

The previous prime is 18227147. The next prime is 18227159. The reversal of 18227158 is 85172281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227159) 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, 808 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (3420675).

Almost surely, 2^18227158 is an apocalyptic number.

18227158 is a deficient number, since it is larger than the sum of its proper divisors (9138242).

18227158 is a wasteful number, since it uses less digits than its factorization.

18227158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222.

The product of its digits is 8960, while the sum is 34.

The square root of 18227158 is about 4269.3275817159. The cubic root of 18227158 is about 263.1719829103.

It can be divided in two parts, 182271 and 58, that added together give a square (182329 = 427²).

The spelling of 18227158 in words is "eighteen million, two hundred twenty-seven thousand, one hundred fifty-eight".