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18222 = 233037

18222 has 8 divisors (see below), whose sum is σ = 36456. Its totient is φ = 6072.

The previous prime is 18217. The next prime is 18223. The reversal of 18222 is 22281.

It can be divided in two parts, 182 and 22, that multiplied together give a palindrome (4004).

18222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

18222 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

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

18222 is an admirable number.

18222 is a modest number, since divided by 222 gives 18 as remainder.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18223) by changing a digit.

18222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513 + ... + 1524.

It is an arithmetic number, because the mean of its divisors is an integer number (4557).

218222 is an apocalyptic number.

18222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18228).

18222 is a wasteful number, since it uses less digits than its factorization.

18222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042.

The product of its digits is 64, while the sum is 15.

The square root of 18222 is about 134.9888884316. The cubic root of 18222 is about 26.3147156053.

The spelling of 18222 in words is "eighteen thousand, two hundred twenty-two".

Divisors: 1 2 3 6 3037 6074 9111 18222