22240447 has 4 divisors (see below), whose sum is σ = 22713696. Its totient is φ = 21767200.

The previous prime is 22240433. The next prime is 22240457. The reversal of 22240447 is 74404222.

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 22240447 - 2⁷ = 22240319 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 (22240457) 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, 236554 + ... + 236647.

It is an arithmetic number, because the mean of its divisors is an integer number (5678424).

Almost surely, 2^22240447 is an apocalyptic number.

22240447 is a deficient number, since it is larger than the sum of its proper divisors (473249).

22240447 is an equidigital number, since it uses as much as digits as its factorization.

22240447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473248.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 22240447 is about 4715.9778413390. The cubic root of 22240447 is about 281.2210576308.

Adding to 22240447 its reverse (74404222), we get a palindrome (96644669).

The spelling of 22240447 in words is "twenty-two million, two hundred forty thousand, four hundred forty-seven".