22000555 has 4 divisors (see below), whose sum is σ = 26400672. Its totient is φ = 17600440.

The previous prime is 22000553. The next prime is 22000579. The reversal of 22000555 is 55500022.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22000555 - 2¹ = 22000553 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22000553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200051 + ... + 2200060.

It is an arithmetic number, because the mean of its divisors is an integer number (6600168).

Almost surely, 2^22000555 is an apocalyptic number.

22000555 is a deficient number, since it is larger than the sum of its proper divisors (4400117).

22000555 is an equidigital number, since it uses as much as digits as its factorization.

22000555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400116.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 22000555 is about 4690.4749226491. The cubic root of 22000555 is about 280.2062893061.

Adding to 22000555 its reverse (55500022), we get a palindrome (77500577).

The spelling of 22000555 in words is "twenty-two million, five hundred fifty-five", and thus it is an aban number.