22403243 has 4 divisors (see below), whose sum is σ = 22413768. Its totient is φ = 22392720.

The previous prime is 22403239. The next prime is 22403279. The reversal of 22403243 is 34230422.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34230422 = 2 ⋅17115211.

It is a cyclic number.

It is not a de Polignac number, because 22403243 - 2² = 22403239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22403233) 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, 818 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (5603442).

Almost surely, 2^22403243 is an apocalyptic number.

22403243 is a deficient number, since it is larger than the sum of its proper divisors (10525).

22403243 is an equidigital number, since it uses as much as digits as its factorization.

22403243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10524.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 22403243 is about 4733.2064184863. The cubic root of 22403243 is about 281.9055524296.

Adding to 22403243 its reverse (34230422), we get a palindrome (56633665).

The spelling of 22403243 in words is "twenty-two million, four hundred three thousand, two hundred forty-three".