22421443 has 4 divisors (see below), whose sum is σ = 24459768. Its totient is φ = 20383120.

The previous prime is 22421431. The next prime is 22421449. The reversal of 22421443 is 34412422.

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 22421443 - 2⁵ = 22421411 is a prime.

It is a super-2 number, since 2×22421443² = 1005442212404498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22421449) 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, 1019146 + ... + 1019167.

It is an arithmetic number, because the mean of its divisors is an integer number (6114942).

Almost surely, 2^22421443 is an apocalyptic number.

22421443 is a deficient number, since it is larger than the sum of its proper divisors (2038325).

22421443 is a wasteful number, since it uses less digits than its factorization.

22421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038324.

The product of its digits is 1536, while the sum is 22.

The square root of 22421443 is about 4735.1286149375. The cubic root of 22421443 is about 281.9818701354.

Adding to 22421443 its reverse (34412422), we get a palindrome (56833865).

The spelling of 22421443 in words is "twenty-two million, four hundred twenty-one thousand, four hundred forty-three".