22194543 has 32 divisors (see below), whose sum is σ = 35356672. Its totient is φ = 12117600.

The previous prime is 22194539. The next prime is 22194559. The reversal of 22194543 is 34549122.

It is not a de Polignac number, because 22194543 - 2² = 22194539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22194543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22194643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66888 + ... + 67218.

It is an arithmetic number, because the mean of its divisors is an integer number (1104896).

Almost surely, 2^22194543 is an apocalyptic number.

22194543 is a deficient number, since it is larger than the sum of its proper divisors (13162129).

22194543 is a wasteful number, since it uses less digits than its factorization.

22194543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its digits is 8640, while the sum is 30.

The square root of 22194543 is about 4711.1084682907. The cubic root of 22194543 is about 281.0274454688.

The spelling of 22194543 in words is "twenty-two million, one hundred ninety-four thousand, five hundred forty-three".