22109543 has 4 divisors (see below), whose sum is σ = 22233240. Its totient is φ = 21985848.

The previous prime is 22109539. The next prime is 22109551. The reversal of 22109543 is 34590122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22109543 - 2² = 22109539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22109443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61580 + ... + 61937.

It is an arithmetic number, because the mean of its divisors is an integer number (5558310).

Almost surely, 2^22109543 is an apocalyptic number.

22109543 is a deficient number, since it is larger than the sum of its proper divisors (123697).

22109543 is a wasteful number, since it uses less digits than its factorization.

22109543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123696.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22109543 is about 4702.0785829248. The cubic root of 22109543 is about 280.6682296585.

Adding to 22109543 its reverse (34590122), we get a palindrome (56699665).

The spelling of 22109543 in words is "twenty-two million, one hundred nine thousand, five hundred forty-three".