22215443 has 4 divisors (see below), whose sum is σ = 22688160. Its totient is φ = 21742728.

The previous prime is 22215409. The next prime is 22215491. The reversal of 22215443 is 34451222.

It is a happy number.

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 22215443 - 2⁸ = 22215187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22214443) 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, 236288 + ... + 236381.

It is an arithmetic number, because the mean of its divisors is an integer number (5672040).

Almost surely, 2^22215443 is an apocalyptic number.

22215443 is a deficient number, since it is larger than the sum of its proper divisors (472717).

22215443 is an equidigital number, since it uses as much as digits as its factorization.

22215443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472716.

The product of its digits is 1920, while the sum is 23.

The square root of 22215443 is about 4713.3261079624. The cubic root of 22215443 is about 281.1156297722.

Adding to 22215443 its reverse (34451222), we get a palindrome (56666665).

The spelling of 22215443 in words is "twenty-two million, two hundred fifteen thousand, four hundred forty-three".