22005555 has 32 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 9847680.

The previous prime is 22005539. The next prime is 22005559. The reversal of 22005555 is 55550022.

It is not a de Polignac number, because 22005555 - 2⁴ = 22005539 is a prime.

22005555 is a modest number, since divided by 5555 gives 2200 as remainder.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22005559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2985 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^22005555 is an apocalyptic number.

22005555 is a deficient number, since it is larger than the sum of its proper divisors (19362765).

22005555 is a wasteful number, since it uses less digits than its factorization.

22005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10291.

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 22005555 is about 4691.0078874374. The cubic root of 22005555 is about 280.2275149119.

Adding to 22005555 its reverse (55550022), we get a palindrome (77555577).

The spelling of 22005555 in words is "twenty-two million, five thousand, five hundred fifty-five".