22122005 has 8 divisors (see below), whose sum is σ = 26603424. Its totient is φ = 17659600.

The previous prime is 22121987. The next prime is 22122011. The reversal of 22122005 is 50022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-22122005 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051 + ... + 6960.

It is an arithmetic number, because the mean of its divisors is an integer number (3325428).

Almost surely, 2^22122005 is an apocalyptic number.

It is an amenable number.

22122005 is a deficient number, since it is larger than the sum of its proper divisors (4481419).

22122005 is an equidigital number, since it uses as much as digits as its factorization.

22122005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9507.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22122005 is about 4703.4035548739. The cubic root of 22122005 is about 280.7209524508.

Adding to 22122005 its reverse (50022122), we get a palindrome (72144127).

The spelling of 22122005 in words is "twenty-two million, one hundred twenty-two thousand, five".