22421005 has 4 divisors (see below), whose sum is σ = 26905212. Its totient is φ = 17936800.

The previous prime is 22420999. The next prime is 22421023. The reversal of 22421005 is 50012422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50012422 = 2 ⋅25006211.

It can be written as a sum of positive squares in 2 ways, for example, as 15350724 + 7070281 = 3918^2 + 2659^2 .

It is not a de Polignac number, because 22421005 - 2³ = 22420997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22421005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242096 + ... + 2242105.

It is an arithmetic number, because the mean of its divisors is an integer number (6726303).

Almost surely, 2^22421005 is an apocalyptic number.

It is an amenable number.

22421005 is a deficient number, since it is larger than the sum of its proper divisors (4484207).

22421005 is an equidigital number, since it uses as much as digits as its factorization.

22421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484206.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22421005 is about 4735.0823646479. The cubic root of 22421005 is about 281.9800339636.

Adding to 22421005 its reverse (50012422), we get a palindrome (72433427).

The spelling of 22421005 in words is "twenty-two million, four hundred twenty-one thousand, five".