22452005 has 4 divisors (see below), whose sum is σ = 26942412. Its totient is φ = 17961600.

The previous prime is 22451987. The next prime is 22452011. The reversal of 22452005 is 50025422.

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 13890529 + 8561476 = 3727^2 + 2926^2 .

It is not a de Polignac number, because 22452005 - 2¹⁸ = 22189861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2245196 + ... + 2245205.

It is an arithmetic number, because the mean of its divisors is an integer number (6735603).

Almost surely, 2^22452005 is an apocalyptic number.

It is an amenable number.

22452005 is a deficient number, since it is larger than the sum of its proper divisors (4490407).

22452005 is an equidigital number, since it uses as much as digits as its factorization.

22452005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490406.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22452005 is about 4738.3546722465. The cubic root of 22452005 is about 282.1099323251.

Adding to 22452005 its reverse (50025422), we get a palindrome (72477427).

The spelling of 22452005 in words is "twenty-two million, four hundred fifty-two thousand, five".