22181147 has 2 divisors, whose sum is σ = 22181148. Its totient is φ = 22181146.

The previous prime is 22181069. The next prime is 22181149. The reversal of 22181147 is 74118122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22181147 - 2¹⁸ = 21919003 is a prime.

Together with 22181149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22181149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11090573 + 11090574.

It is an arithmetic number, because the mean of its divisors is an integer number (11090574).

Almost surely, 2^22181147 is an apocalyptic number.

22181147 is a deficient number, since it is larger than the sum of its proper divisors (1).

22181147 is an equidigital number, since it uses as much as digits as its factorization.

22181147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 26.

The square root of 22181147 is about 4709.6865076139. The cubic root of 22181147 is about 280.9708940104.

Adding to 22181147 its reverse (74118122), we get a palindrome (96299269).

The spelling of 22181147 in words is "twenty-two million, one hundred eighty-one thousand, one hundred forty-seven".