22018229 has 8 divisors (see below), whose sum is σ = 22331160. Its totient is φ = 21707776.

The previous prime is 22018223. The next prime is 22018237. The reversal of 22018229 is 92281022.

It can be written as a sum of positive squares in 4 ways, for example, as 2640625 + 19377604 = 1625^2 + 4402^2 .

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 22018229 - 2⁸ = 22017973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22018198 and 22018207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018223) 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, 23237 + ... + 24165.

It is an arithmetic number, because the mean of its divisors is an integer number (2791395).

Almost surely, 2^22018229 is an apocalyptic number.

It is an amenable number.

22018229 is a deficient number, since it is larger than the sum of its proper divisors (312931).

22018229 is a wasteful number, since it uses less digits than its factorization.

22018229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22018229 is about 4692.3585753862. The cubic root of 22018229 is about 280.2813031773.

The spelling of 22018229 in words is "twenty-two million, eighteen thousand, two hundred twenty-nine".