18222259 has 8 divisors (see below), whose sum is σ = 20002752. Its totient is φ = 16462440.

The previous prime is 18222257. The next prime is 18222271. The reversal of 18222259 is 95222281.

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

It is a cyclic number.

It is not a de Polignac number, because 18222259 - 2¹ = 18222257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18222259.

It is not an unprimeable number, because it can be changed into a prime (18222257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3289 + ... + 6874.

It is an arithmetic number, because the mean of its divisors is an integer number (2500344).

Almost surely, 2^18222259 is an apocalyptic number.

18222259 is a deficient number, since it is larger than the sum of its proper divisors (1780493).

18222259 is a wasteful number, since it uses less digits than its factorization.

18222259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337.

The product of its digits is 5760, while the sum is 31.

The square root of 18222259 is about 4268.7537994127. The cubic root of 18222259 is about 263.1484028022.

It can be divided in two parts, 182222 and 59, that added together give a palindrome (182281).

The spelling of 18222259 in words is "eighteen million, two hundred twenty-two thousand, two hundred fifty-nine".