22543013 has 4 divisors (see below), whose sum is σ = 23523168. Its totient is φ = 21562860.

The previous prime is 22542991. The next prime is 22543019. The reversal of 22543013 is 31034522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22543013 - 2⁸ = 22542757 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22543019) 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, 490043 + ... + 490088.

It is an arithmetic number, because the mean of its divisors is an integer number (5880792).

Almost surely, 2^22543013 is an apocalyptic number.

22543013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

22543013 is a deficient number, since it is larger than the sum of its proper divisors (980155).

22543013 is an equidigital number, since it uses as much as digits as its factorization.

22543013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980154.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 22543013 is about 4747.9482937370. The cubic root of 22543013 is about 282.4905909624.

Adding to 22543013 its reverse (31034522), we get a palindrome (53577535).

The spelling of 22543013 in words is "twenty-two million, five hundred forty-three thousand, thirteen".