22018227 has 16 divisors (see below), whose sum is σ = 36602112. Its totient is φ = 11437920.

The previous prime is 22018223. The next prime is 22018237. The reversal of 22018227 is 72281022.

It is a happy number.

It is not a de Polignac number, because 22018227 - 2² = 22018223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22018197 and 22018206.

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 15 ways as a sum of consecutive naturals, for example, 47428 + ... + 47889.

It is an arithmetic number, because the mean of its divisors is an integer number (2287632).

Almost surely, 2^22018227 is an apocalyptic number.

22018227 is a deficient number, since it is larger than the sum of its proper divisors (14583885).

22018227 is a wasteful number, since it uses less digits than its factorization.

22018227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95338.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 22018227 is about 4692.3583622737. The cubic root of 22018227 is about 280.2812946909.

Adding to 22018227 its reverse (72281022), we get a palindrome (94299249).

The spelling of 22018227 in words is "twenty-two million, eighteen thousand, two hundred twenty-seven".