22438481 has 4 divisors (see below), whose sum is σ = 24164532. Its totient is φ = 20712432.

The previous prime is 22438459. The next prime is 22438511. The reversal of 22438481 is 18483422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18483422 = 2 ⋅9241711.

It can be written as a sum of positive squares in 2 ways, for example, as 11282881 + 11155600 = 3359^2 + 3340^2 .

It is not a de Polignac number, because 22438481 - 2¹⁴ = 22422097 is a prime.

It is a super-2 number, since 2×22438481² = 1006970859174722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22438421) 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, 863006 + ... + 863031.

It is an arithmetic number, because the mean of its divisors is an integer number (6041133).

Almost surely, 2^22438481 is an apocalyptic number.

It is an amenable number.

22438481 is a deficient number, since it is larger than the sum of its proper divisors (1726051).

22438481 is a wasteful number, since it uses less digits than its factorization.

22438481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726050.

The product of its digits is 12288, while the sum is 32.

The square root of 22438481 is about 4736.9273796418. The cubic root of 22438481 is about 282.0532778300.

The spelling of 22438481 in words is "twenty-two million, four hundred thirty-eight thousand, four hundred eighty-one".