22218147 has 24 divisors (see below), whose sum is σ = 37945440. Its totient is φ = 12257280.

The previous prime is 22218137. The next prime is 22218179. The reversal of 22218147 is 74181222.

It is not a de Polignac number, because 22218147 - 2⁶ = 22218083 is a prime.

It is a super-2 number, since 2×22218147² = 987292112227218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22218147.

It is not an unprimeable number, because it can be changed into a prime (22218127) 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 23 ways as a sum of consecutive naturals, for example, 4254 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (1581060).

Almost surely, 2^22218147 is an apocalyptic number.

22218147 is a deficient number, since it is larger than the sum of its proper divisors (15727293).

22218147 is a wasteful number, since it uses less digits than its factorization.

22218147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12203 (or 12200 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 22218147 is about 4713.6129455016. The cubic root of 22218147 is about 281.1270348389.

Adding to 22218147 its reverse (74181222), we get a palindrome (96399369).

The spelling of 22218147 in words is "twenty-two million, two hundred eighteen thousand, one hundred forty-seven".