22423543 has 4 divisors (see below), whose sum is σ = 22455880. Its totient is φ = 22391208.

The previous prime is 22423537. The next prime is 22423567. The reversal of 22423543 is 34532422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34532422 = 2 ⋅17266211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22423543 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 (22423043) 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, 15105 + ... + 16522.

It is an arithmetic number, because the mean of its divisors is an integer number (5613970).

Almost surely, 2^22423543 is an apocalyptic number.

22423543 is a deficient number, since it is larger than the sum of its proper divisors (32337).

22423543 is an equidigital number, since it uses as much as digits as its factorization.

22423543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32336.

The product of its digits is 5760, while the sum is 25.

The square root of 22423543 is about 4735.3503566262. The cubic root of 22423543 is about 281.9906733666.

Adding to 22423543 its reverse (34532422), we get a palindrome (56955965).

The spelling of 22423543 in words is "twenty-two million, four hundred twenty-three thousand, five hundred forty-three".