22247171 has 2 divisors, whose sum is σ = 22247172. Its totient is φ = 22247170.

The previous prime is 22247161. The next prime is 22247177. The reversal of 22247171 is 17174222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22247171 - 2¹⁸ = 21985027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22247171.

It is not a weakly prime, because it can be changed into another prime (22247177) 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, 11123585 + 11123586.

It is an arithmetic number, because the mean of its divisors is an integer number (11123586).

Almost surely, 2^22247171 is an apocalyptic number.

22247171 is a deficient number, since it is larger than the sum of its proper divisors (1).

22247171 is an equidigital number, since it uses as much as digits as its factorization.

22247171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 26.

The square root of 22247171 is about 4716.6906830955. The cubic root of 22247171 is about 281.2493954884.

The spelling of 22247171 in words is "twenty-two million, two hundred forty-seven thousand, one hundred seventy-one".