18227229 has 8 divisors (see below), whose sum is σ = 24458400. Its totient is φ = 12073776.

The previous prime is 18227219. The next prime is 18227233. The reversal of 18227229 is 92272281.

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

It is not a de Polignac number, because 18227229 - 2⁵ = 18227197 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18227229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18879 + ... + 19820.

It is an arithmetic number, because the mean of its divisors is an integer number (3057300).

Almost surely, 2^18227229 is an apocalyptic number.

It is an amenable number.

18227229 is a deficient number, since it is larger than the sum of its proper divisors (6231171).

18227229 is a wasteful number, since it uses less digits than its factorization.

18227229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38859.

The product of its digits is 8064, while the sum is 33.

The square root of 18227229 is about 4269.3358968345. The cubic root of 18227229 is about 263.1723246200.

The spelling of 18227229 in words is "eighteen million, two hundred twenty-seven thousand, two hundred twenty-nine".