22161043 has 2 divisors, whose sum is σ = 22161044. Its totient is φ = 22161042.

The previous prime is 22161031. The next prime is 22161077. The reversal of 22161043 is 34016122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22161043 - 2⁹ = 22160531 is a prime.

It is a super-2 number, since 2×22161043² = 982223653695698, 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 22161043.

It is not a weakly prime, because it can be changed into another prime (22161023) 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 as a sum of consecutive naturals, namely, 11080521 + 11080522.

It is an arithmetic number, because the mean of its divisors is an integer number (11080522).

Almost surely, 2^22161043 is an apocalyptic number.

22161043 is a deficient number, since it is larger than the sum of its proper divisors (1).

22161043 is an equidigital number, since it uses as much as digits as its factorization.

22161043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 22161043 is about 4707.5516991319. The cubic root of 22161043 is about 280.8859818660.

Adding to 22161043 its reverse (34016122), we get a palindrome (56177165).

The spelling of 22161043 in words is "twenty-two million, one hundred sixty-one thousand, forty-three".