22147 has 2 divisors, whose sum is σ = 22148. Its totient is φ = 22146.

The previous prime is 22133. The next prime is 22153. The reversal of 22147 is 74122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22147 is a prime.

22147 is a lucky number.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 22147.

It is not a weakly prime, because it can be changed into another prime (22157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073 + 11074.

It is an arithmetic number, because the mean of its divisors is an integer number (11074).

2²²¹⁴⁷ is an apocalyptic number.

22147 is a deficient number, since it is larger than the sum of its proper divisors (1).

22147 is an equidigital number, since it uses as much as digits as its factorization.

22147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112, while the sum is 16.

The square root of 22147 is about 148.8186816230. The cubic root of 22147 is about 28.0826638761.

Adding to 22147 its reverse (74122), we get a palindrome (96269).

It can be divided in two parts, 22 and 147, that added together give a square (169 = 13²).

The spelling of 22147 in words is "twenty-two thousand, one hundred forty-seven", and thus it is an iban number.