22440073 has 4 divisors (see below), whose sum is σ = 22554180. Its totient is φ = 22325968.

The previous prime is 22440059. The next prime is 22440133. The reversal of 22440073 is 37004422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10419984 + 12020089 = 3228^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 22440073 - 2⁹ = 22439561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (22440043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56758 + ... + 57151.

It is an arithmetic number, because the mean of its divisors is an integer number (5638545).

Almost surely, 2^22440073 is an apocalyptic number.

It is an amenable number.

22440073 is a deficient number, since it is larger than the sum of its proper divisors (114107).

22440073 is a wasteful number, since it uses less digits than its factorization.

22440073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114106.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 22440073 is about 4737.0954180806. The cubic root of 22440073 is about 282.0599481894.

Adding to 22440073 its reverse (37004422), we get a palindrome (59444495).

The spelling of 22440073 in words is "twenty-two million, four hundred forty thousand, seventy-three".