22290447 has 4 divisors (see below), whose sum is σ = 29720600. Its totient is φ = 14860296.

The previous prime is 22290419. The next prime is 22290449. The reversal of 22290447 is 74409222.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22290447 - 2⁷ = 22290319 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 (22290449) 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, 3715072 + ... + 3715077.

It is an arithmetic number, because the mean of its divisors is an integer number (7430150).

Almost surely, 2^22290447 is an apocalyptic number.

22290447 is a deficient number, since it is larger than the sum of its proper divisors (7430153).

22290447 is an equidigital number, since it uses as much as digits as its factorization.

22290447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430152.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 22290447 is about 4721.2759927799. The cubic root of 22290447 is about 281.4316428598.

Adding to 22290447 its reverse (74409222), we get a palindrome (96699669).

The spelling of 22290447 in words is "twenty-two million, two hundred ninety thousand, four hundred forty-seven".